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<graft>
yo, where do i get a nice class that does balanced binary search trees?
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<Pandee>
i am using st2 and the ruby shell in vagrant. Is there anyway to execute a ruby script in the irb, but stay within the script? so i can test different inputs etc w/o having to edit and save in the text editor
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<zendeavor>
perhaps require the script in irb and use it directly...?
<Pandee>
can you elaborate more on that?
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<zendeavor>
that was it.
<czervik>
hey guys. anyone know offhand if File.readlines opens the file in read only mode and automatically closes it. I'm running Ruby 1.8.7 (this is for a Puppet 2.7x module).
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<Pandee>
in irb i'm typing "ruby test.rb". Is that what you mean?
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<zendeavor>
perhaps i don't understand how to use a repl
<havenwood>
Pandee: Pry is awesome, great for going between editor and Ruby REPL: http://pryrepl.org/
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<havenwood>
Pandee: I'd recommend just using Pry instead of irb.
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<Pandee>
thanks i'll check that out
<havenwood>
czervik: Yes and yes.
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<czervik>
havenwood: thanks I appreciate it. cheers
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<Nilium>
One of these days I should probably try fiddling with EventMachine to see why some people talk about it like it's their god.
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<zendeavor>
evented design is kewl
<zendeavor>
you use linux? you checked out inotify? awesome stuff.
<havenwood>
Nilium: I've heard a good bit of griping about EventMachine too. Kinda a mixed bag.
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<zendeavor>
there's griping about all the things, it's bound to happen
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<havenwood>
EMSynchrony does some neat stuff. Celluloid::IO is interesting as a non EM route.'
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<havenwood>
nio4r
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<sam113101>
I don't understand how EventMachine works
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<Nilium>
I use OS X and haven't used inotify. I just mostly don't know what I'd use eventmachine for since I do a lot of thread/interprocess stuff with ZMQ but it seems like EM is more like a generic server.
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<graft>
is there any hassle in migrating to ruby 2?
<graft>
or a guide to navigating the hassle?
<sam113101>
the thing I don't understand is, how can I use ActiveRecord with EventMachine without blocking the reactor?
<havenwood>
Hard to find good links on reactor pattern and evented io. Maybe node or evented io specific stuff would turn up more.
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<havenwood>
I have altitude sickness, uhhg. Can't think straight.
<Eiam>
havenwood: just read stuff on twisted?
<sam113101>
well, I kind of knew about that
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<Eiam>
as there is quite a bit covering that event driven/reactor based bits, since its been around for awhile
<havenwood>
Eiam: Good point that't be a good place to look.
<sam113101>
it just seems to me that ActiveRecord would block (although maybe not for a long time)
<havenwood>
sam113101: ^
<Eiam>
my first major thing I ever did in python (while basically learning python) was based on Twisted and it was a stunning success
<sam113101>
Eiam: did you have to use async database drivers?
<havenwood>
sam113101: ah, you're looking for Rails specific elements or something? (Sorry, i'm at 10,000 ft an apparently can't think at this alt.)
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<Eiam>
sam113101: no, I was using async https requests
<sam113101>
not really, just that I'd like to use ActiveRecord
<Eiam>
millions of them
<Eiam>
spread across EC2 instances
<sam113101>
what are you doing there havenwood
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<havenwood>
sam113101: I just tagged along with family to a conference up at Breckenridge, Colorado for a vacation. And have been awful sick since i got here. >.>
<Eiam>
on the receiving end for sure someones database got the snot beat out of it, asynchronously =)
<Eiam>
but it wasn't mine =)
<havenwood>
Think i'm going to flee to lower elevation tomorrow.
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<Eiam>
havenwood: eat more carbs ?
<Eiam>
and iron
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<sam113101>
if the ActiveRecord was made async, how would it even work?
<graft>
i'm trying to figure out if there's a way to the binary search equivalent of a select using the bsearch 'find-any' mode
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<Eiam>
sam113101: I mean thats the general approach for event driven/async frameworks
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<eoinkelly>
Hi all, I have a slightly abstract question. The pickaxe says "Most statements in ruby return a value". My understanding is that *everything* in ruby is an expression (hence returns a value). My question is: Are there any true statements (code constructs that don't return a value) in ruby?
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<havenwood>
eoinkelly: Maybe they mean `nil` as the non-value?
<havenwood>
Like #puts.
<sam113101>
because otherwise I don't think they exist
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<eoinkelly>
haven wood, sam113101 perhaps they do mean nil. I couldn't think of any either.
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<sam113101>
eoinkelly: raise. test = 'wat'; test = raise('nigga'); puts test
<sam113101>
it will print 'wat'
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<havenwood>
sam113101: Racial slurs aren't tolerated in this channel. No matter the intent. Desist.
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<pontiki>
thank you. i was about to leave
<sam113101>
is raise a real function?
<pontiki>
it is unsafe enough
<sam113101>
havenwood: ran out of inspiration
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<sam113101>
eoinkelly: because a was never defined
<sam113101>
give it a value beforehand
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<eoinkelly>
sam113101: ah now I see what you mean. Yep throw seems to qualify too. cheers!
<graft>
can someone explain why this returns nil? [ 0, 1, 2 ].bsearch{|x| x < 1 }
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<RubyPanther>
graft: I'm not totally sure but I think you're just going backwards and you should use >= instead of <
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<eoinkelly>
graft: If I am reading http://ruby-doc.org/core-2.0/Array.html#method-i-bsearch correctly and you are wishing to use the "find minimum" mode then your block needs to return the actual element when it finds the correct one. Your block always returns true|false
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<eoinkelly>
Oops - scratch that, I interpreted the docs incorrectly.
<denysonique>
Can a class method access instance variables of the classes' instance?
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<Eiam>
denysonique: well, @@ is available across class instances..
<graft>
eoinkelly: i think i understand what's happening... it needs a condition that maps to [ false, false, true, true ]
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<denysonique>
Can a class body method interact with instance vars? E.g. a class body method sets an instance var on the initialized class?
<eoinkelly>
AFAIK binary search starts in the middle and uses true/false to indicated "guess lower"/"guess higher". It seems to be that false is being interpreted as "guess higher"
<denysonique>
s/class\?/class/
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<eoinkelly>
which is causing it to look in the wrong direction and never find the answer
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<Eiam>
>> class Test @@myvar = 2; def self.test @@myvar end end
<eval-in>
Eiam => /tmp/execpad-f7f40df8c873/source-f7f40df8c873:2: syntax error, unexpected tCVAR, expecting '<' or ';' or '\n' ... (https://eval.in/40257)
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<Eiam>
denysonique: because it follows the class, not the instance
<denysonique>
Class body method: "That method can execute arbitrary code, also in the context of the class, including creating new methods, executing other pieces of code, or updating a class instance variable"
<denysonique>
This is what Katz says
<eoinkelly>
graft: [ 1, 2, 3,4,5 ].bsearch{|x| puts "trying: #{x}"; puts "block is returning #{(x < 2)}"; !(x < 2) } - it seems that when the condition flips from false to true, then bsearch returns the last value for which it was false.
<Eiam>
denysonique: okay? yes, I said you can update a class instance variable
<denysonique>
Some misunderstanding going on here
<denysonique>
Eiam: Can I achieve this through a class (body) method?
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<Nilium>
Only ended up answering it because the other guy's answer was stupid.
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<sevenseacat>
oh a nice detailed answer
<sevenseacat>
haha nice avatar
<Nilium>
Everyone just thinks it's a penguin. :|
<sevenseacat>
i hope you correct them
<sevenseacat>
and tell them its a prinny
<Nilium>
It's better if I don't out myself as a Disgaea fan.
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<sevenseacat>
i learnt something from your answer, therefore it is a good answer. im good with rails, not so good with the intricacies of plain ruby
<Nilium>
I left out the part about Foo.singleton_class.module_exec { def bar ; "baz" ; end } working because that seemed like it might be cruel and unusual.
<Nilium>
Also left out how to use define_singleton_method because that's only really useful for metaprogramming stuff.
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<pzuraq>
does anyone know if prawn can be used to fill out preexisting pdfs made with acrobat?
<rubanub>
hey everyone, im trying to set a 1 second timeout on a socket connection, i've tried a bunch of different methods i've found online but can't seem to find one that works. Perhaps this is due to my lack of knowledge, can someone point me in the right direction?
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<pzuraq_>
using rbenv, for some reason I can't get rdoc to install any documentations for my gems
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<Nilium>
Does gem rdoc --overwrite --all --rdoc --ri not work?
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<pzuraq_>
ok, there we go
<pzuraq_>
what do those last two options do?
<havenn>
rubanub: Have you already tried IO.select?
<Nilium>
--rdoc tells it to generate HTML documentation, --ri tells it to generate ri documentation
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<pzuraq_>
ah, weird that I didn't see that anywhere..
<pzuraq_>
I was just doing it with --overwrite --all
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<Nilium>
I think it generates only ri docs by default.
<Nilium>
So if you were looking specifically for the HTML docs, that might be it.
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<pzuraq_>
Nilium: It wasn't generating either for some reason
<Nilium>
Wonky.
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<Nilium>
I have no explanation for that.
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<lemonsaprrow>
hi
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<sevenseacat>
long time no see.
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<raar>
I have no experience with Ruby on Rails, but have been asked to change some code in a controller (a password) while someone else is on holiday. I've deployed my changes, but it seems like the old code is still (cached) in use. How do I flush this cache?
<sevenseacat>
raar: did you restart the server after deploying your changes?
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<raar>
Nilium: I did actually, but I have no idea where to write "Rails.cache.clear" - I've never worked with RoR before I'm afraid
<Nilium>
Look for a terminal thingy.
<Nilium>
I don't use Rails, so that's all the advice I can offer there
<sevenseacat>
also, people who dont know rails playing with production code is a scary thing
<raar>
sevenseacat: I didn't - I figured there might be a better way to do it than restarting the server
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<sevenseacat>
i dont mean the entire server, i mean the web server.
<sevenseacat>
eg, apache
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<raar>
sevenseacat: I know that :)
<sevenseacat>
or passenger, rather, i dont know how you're serving your app
<raar>
yep, passenger
<sevenseacat>
well you dont really have a choice if you're deploying code changes.
<sevenseacat>
touch tmp/restart.txt in the app folder on the server
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<raar>
sevenseacat: thank you!
<sevenseacat>
no probs :)
<raar>
and yep, I don't really want to make these changes, but apparently we have to change the password, and since it's only a single string change, I think it will be ok :)
<sevenseacat>
yay, hardcoded passwords :P
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<RubyPanther>
lol this is the entertainment I come for, thanks
<Guest83731>
Idiot question, how do I get a unique u_name? I'm new to the IRC world.
<sevenseacat>
/nick <name>
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<Guest83731>
success?
<sevenseacat>
no
<Guest83731>
Damn..
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<Guest83731>
How do you know if it takes? There is no way to know without sending a message.
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<sevenseacat>
it will say something like 'you are now known as <name>'
<sevenseacat>
eg.
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<Guest83731>
It doesn't work...
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<Guest83731>
The same command line you chat with?
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<sevenseacat>
yep
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<raar>
without < and >
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<raar>
It may not work - for example if the nickname is already in use on the network
<Guest83731>
I just tried a bunch of random chars to no avail
<Guest83731>
Oh well, I guess Gust83731 will work
<Nilium>
Are you in a room where you need to be identified?
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<Guest83731>
I'm in #ruby
<Guest83731>
This is my first time in the IRC world
<slash_nick>
I kind of like Guest83731, for what it's worth :)
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<Guest83731>
I do too, sounds kind of james-bondish
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<sam113101>
soon you'll discover colors
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<bnagy>
meh, not a patch on good ol Guest83730
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<sam113101>
they are wonderful
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<sam113101>
but not to abuse
<Guest83731>
What's the latest on the ruby streets?
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<sam113101>
you mean latest version?
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<Guest83731>
Yes, besides... 2.0.0
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<sam113101>
2.0.0-p247
<Guest83731>
sam, if you have one word of advice for a new developer, what would it be?
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<Guest83731>
I'm in the process of learning and i'm struggling with rspec for some reason..
<Nilium>
I have one word of advice: hide the sharp objects.
<Guest83731>
To avoid stabbing yourself haha?
<Nilium>
No, to avoid stabbing other people.
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<Nilium>
Nobody cares if you stab yourself.
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<Guest83731>
What do you guys think of dev boot camp and the like?
<Guest83731>
Other people as in the users?
<Nilium>
Never heard of it.
<Guest83731>
How did you pick up ruby?
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<sevenseacat>
got a ruby/rails tutorial. used it.
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<Nilium>
I was working as an artist on a game called Bioscythe and one of the programmers showed me Ruby 1.8 and how to use GL and Fox in it back in something like '05 or '06 and I started using it.
<Guest83731>
I'm in the process of that right now. It's quite fun, but the future look bleak
<Guest83731>
I have done some VB work in the past, but my no means a pro coder
<Nilium>
I did contract work on a game engine, so that's the closest I get to being 'professional.'
<Guest83731>
I really like the ruby language so far. I just ran into a place where I was struggling tonight... So i decided to check out the IRC world to get a feel for the culture
<sevenseacat>
ive been a web developer for a long time, and made the switch to ruby and rails two and a half years ago.
<Guest83731>
How sustainable do you think ruby is?
* Nilium
shrugs
<Nilium>
What's sustainable mean in the context of a programming language?
<Guest83731>
What's the shelf life?
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<Nilium>
What's that mean in the context of a programming language?
<sevenseacat>
42 years.
<Nilium>
People still use Cobol. You're asking the wrong question.
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<Guest83731>
I know know the concepts are universal...
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<Guest83731>
When you hit a hard spot, how did you overcome it?
<Guest83731>
In learning Ruby
<bnagy>
strict meditation and vegetarian diet
<sam113101>
I was looking for a new interpreted language, and also I was looking for a new MVC framework, I chose ruby and rails
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<sam113101>
web MVC
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<sam113101>
I did some python when I was a kid but I decided to stop using it
<Guest83731>
Doesn't python translate pretty well into ruby?
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<popl>
I did the same thing with hamster style.
<sam113101>
what does translate mean in that context?
<sam113101>
they're both interpreted languages
<Nilium>
I wonder if fxruby works in Ruby 2.0
<sam113101>
if you know one you can easily learn the other
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<Nilium>
The answer is no.
<Nilium>
At least not without FOX, which I forgot to install.
<Guest83731>
That's what I meant sam
* Nilium
fixes this.
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<sam113101>
does FOX look the same on every platfrom? or does it look alien?
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<Nilium>
Don't know or remember
<Guest83731>
sorry for clogging up your chat room. I just have a bunch of rookie questions
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<Nilium>
I can only find pictures of it on some Linux desktops and Windows
<sam113101>
at first I wanted to learn shoes, but I think the guy was high most of the time
<sam113101>
and he kind of disappeared from the Internet I think
<sam113101>
at least that's what I heard
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<Nilium>
Shoes as far as I can tell is a browser window with no good qualities.
<sam113101>
yeah it's not really featureful
<sevenseacat>
haha
<Nilium>
Also, why was kind of an oddity.
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<Nilium>
Less said of him the better.
<sevenseacat>
yeah why disappeared many moons ago
<sam113101>
who was he? seriously
<Nilium>
Oh dear god, FOX on Mac OS fires up an X server
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<Nilium>
Yeah, that's not good.
<sam113101>
X runs on Mac OS?
<Nilium>
Sort of.
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<Nilium>
XQuartz is an implementation of it that is probably kind of outdated now
<Nilium>
So you can run stuff that uses X, but it's really, really terrible.
<Nilium>
Most GTK apps ported to OS X require it.
<sam113101>
you'd think apple would come up with something better
<Nilium>
Well, they have their own UI toolkit, desktop manager, etc.
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<Nilium>
It's just not feasible for most people to port their GTK stuff to Cocoa and so on
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<Nilium>
Though there is a fork of GTK that's implemented on top of Cocoa, but I don't think that's quite ready for use yet
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<Guest83731>
I guess I was banned? Error(435): djkljada34343 #ruby-lang Cannot change nickname while banned on channel
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<bnagy>
Guest83731: you need to register your nick to speak on ruby-lang
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<sam113101>
that has happened to me a few times
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<Guest83731>
thanks
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<poseid>
I want to check that a city is not a sequence of numbers
<poseid>
city =~ /^[ \d]/
<poseid>
city =~ /^[ \d]*/
<poseid>
and then check if I have $1 is not working
<poseid>
a better option?
<sam113101>
what?
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<poseid>
how to check with a regex that a string are just characters, not digits
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<Mon_Ouie>
city !~ /\d/
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<poseid>
oh, ok
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<poseid>
thanks, that looks nice
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<sam113101>
wow, I didn't know about !~ (I did know about =~ though)
<sam113101>
is it new?
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<Mon_Ouie>
No. It's nothing fancy, it's just !(city =~ /\d/)
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<sam113101>
learning new things e-ve-ry-day
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<sam113101>
you never fully know your ruby
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<kizzx2>
sam113101: argh i think i missed, what's that new cool syntax you were talking about?
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<sam113101>
kizzx2: !~
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<sam113101>
but I don't think it's new
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<kizzx2>
sam113101: so true, i just said "you never fully know your ruby" to myself, too
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<ghr>
I want to be able to relate the post back to it's blog
<ghr>
(like rails associations)
<ghr>
so `post.blog`
<MrZYX>
so what do you pass to Post.new, what's that called?
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<ghr>
I can pass the blog instance, but is that good practice, since blog is going to load posts, each of which contain an instance of blog
<maloik>
I have a search controller that populates arrays of different types of objects (@blogs, @posts, @users for instance), does anyone know how to display that using rabl? I've got no idea so far...
<g0to>
MrZYX, I still don't understand what is this doing if file_name is 18333fig0103 -> file_name.sub(/18333fig0(\d)0?(\d+)\-tn/, '\1.\2')
<maloik>
ehh wrong channel
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<Mon_Ouie>
g0to: Nothing, because it doesn't match the regular expression
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<Mon_Ouie>
Yes, but it isn't needed here (it's the same as if it had been -tn)
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<MrZYX>
the author just feared he would create a character range [b-w]
<ghr>
MrZYX ah okay. So that's typical best practice?
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<MrZYX>
no, not really. It shows lack of fully understanding regular expressions
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<ghr>
and not a demeter/srp violation?
<g0to>
MrZYX, great. thanks! So the outpud would be 1.3. Is that correct?
<g0to>
*output
<MrZYX>
yes
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<DanielRb>
:D
<DanielRb>
:)
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<byprdct>
I wanted to fill in forms for a few websites with mechanize and I was wondering what the best approach for this would be e.g. rake tasks?
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<epitron>
byprdct: you want to know if they should be rake tasks or standalone scripts?
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<byprdct>
yes sir :)
<epitron>
need more input
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<epitron>
how many forms are you filling out? how often? automatically?
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<epitron>
who's filling them out?
<epitron>
what's in the forms?
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<epitron>
do you want to collect output after filling them out?
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<epitron>
do you want to trigger filling out the forms based on some database things being added?
<shevy>
epitron would make a good FBI agent
<byprdct>
I want to build an app that fills in forms that my wife is currently doing manually so what I was thinking I would do is create one form in a rails app that would save the data to be used by mechanize for each form. This is where I'm stuck, should I create a different rake task for each form because every website is different put the data enterted will be the same and also should I even be using a rake task for this?
<shevy>
btw is ruby 1.9.x line now discontinued?
<byprdct>
epitron the forms would be filled out many times daily
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<byprdct>
10+ forms
<shevy>
I am asking because my yaml files work with 1.9.x still due to syck, but they won't work with psych, so I cant yet switch to 2.x
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<epitron>
hmm
<byprdct>
:)
<epitron>
i wouldn't use a rails app for that
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<byprdct>
really?
<epitron>
i'd build a browser plugin or something
<epitron>
with a button that tries to guess the fields
<epitron>
then lets you correct them
<hanmac>
shevy how do you parse the yaml files? maybe it helps when you read them with an different encoding?
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<epitron>
byprdct: when you say "every website is different", is that a fixed set of websites?
<epitron>
is your tool trying to guess the form fields?
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<byprdct>
well the data that is entered into each website will be the same about 95% of the time, minor differences but when I say different I was just thinking that by creating different rake tasks for each website would be a good idea just in case one website changed and I had to update the rake task It would break any of the other sites
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<byprdct>
epitron I would know the form fields
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<epitron>
shevy: what about your yaml files is breaking psych?
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<epitron>
byprdct: but this is a small known set of websites
<epitron>
not an infinite set
<byprdct>
correct
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<byprdct>
epitron would the rake tasks be a good fit for this?
<epitron>
if it's a webapp, that means you'd have to run the rake tasks yourself?
<epitron>
from the commandline?
<shevy>
epitron my yaml files are in some ISO encoding, not UTF, and there are illegal characters in it when psych tries to read it (it assumes they are valid UTF)
<byprdct>
rake has to be run from the command line?
<byprdct>
I didnt know that
<epitron>
ah.. gross
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<epitron>
wouldn't iconv fix that?
<shevy>
epitron I tried to... let me try to get you the error message I had with it...
<epitron>
byprdct: yeah... maybe what you want is a background job processor?
<epitron>
shevy: is it mixed-encoding?
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<shevy>
"iconv: illegal input sequence at position 7527"
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* epitron
arrests shevy
<shevy>
hehe
<shevy>
the newly produced file by iconv is truncated after that error
<epitron>
you have violated the laws of CP237
<shevy>
wait
<epitron>
soo.. is it mixed encoding?
<shevy>
hmmmm
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<shevy>
this is so strange
<epitron>
a really braindead simple way of fixing this, if it's mixed, is to read the yaml file one line at a time in ruby, and try convert each line on each of your possible input formats until one works
<epitron>
then write that out as utf8 to an output file
<shevy>
"file" now tells me that this is UTF-8 Unicode text, but my editor claims it is ISO8859-1 :(
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<Mon_Ouie>
I wouldn't do it like that though (because that means you have to read the regexp to be able to read the code, usually you can just assume what it's supposed to do based on the context)
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<j416>
Mon_Ouie: true. thanks.
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<steerio>
hey
<steerio>
anyone familiar with Thor?
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<steerio>
i'd like to pass an array parameter, but the advertised "--option=a b c" doesn't work
<steerio>
(and the whole idea is problematic to begin with, what if i want C to be the first normal argument?)
<steerio>
--option='a b c' also doesn't work; it'll be a sole value "a b c"
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<gnufied>
okay, try:
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<gnufied>
—watchdir foo bar
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<gnufied>
should work
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<meghana>
hey
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<steerio>
gnufied: doesn't, treats the second one as a main argument
<steerio>
gnufied: ERROR: guard start was called with arguments ["bar"]
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<gnufied>
sigh, something wrong then
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<steerio>
the whole idea of passing arrays like that is flawed
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<gnufied>
well it works
<steerio>
apparently it doesn't
<gnufied>
in bundler for example, you can say: bundle install —without test development
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<gnufied>
and it won't install gems from test & development groups
<gnufied>
something funny going on with guard
<gnufied>
no idea
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<meghana>
Can somebody give me links of some best ruby tutorials. i am a beginner
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<steerio>
gnufied: it works, until your command doesn't need positional arguments :)
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<steerio>
gnufied: and then it becomes ambiguous. i think something like that is the case here
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<gnufied>
I usually prefer subcommand to be first argument
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<gnufied>
for example: bundle —without dev test install will be surely amgbiuous
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<gnufied>
usually CLI option parsers handle that
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<steerio>
apparently guard takes a different approach
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<steerio>
though the error message comes from thor
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<dawkirst>
I'm curious, how many people opt to develop in a virtual machine?
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<ghr>
dawkirst I do for applications
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<ghr>
(not so much for libraries)
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<dawkirst>
ghr, what's the reason? Is it so you can control the app environment?
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<ghr>
Yeah. I know that the application is being developed on the same system as the target deployment system (or, as close as practical)
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<dawkirst>
Also, do you develop apps in virtual machines as a rule? Is it considered effective? (I'm new to programming, so I don't have a clear reference)
<dawkirst>
That makes sense.
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<ghr>
It's also nice that you can trash the environment rather than worrying about "messing up my setup"
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<ghr>
We also use automated configuration management (Ansible) so the playbooks can be used in all environments to create the system (dev, test, live, etc)
<dawkirst>
That's exactly that - "messing up my setup"
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<ghr>
I'm considering doing *all* dev in a VM
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<dawkirst>
Ansible similar to Puppet and Chef?
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<ghr>
yeah
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<dawkirst>
I'm seriously considering that as well
<dawkirst>
I've heard mention of vagrant as well, would that be worth looking into?
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<ghr>
Yes, I use Vagrant which makes all of this *much* easier
<ghr>
you just git clone && vagrant up && vagrant ssh and you're away
<dawkirst>
Awesome
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<mordonez>
Hi guys
<mordonez>
I am having troubles trying to compile the assets
<quickycoder>
I would like to build a Machine Learning library like Weka for ruby. Does it sound a good thing to do ? Will it be helpful to people?
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<aedorn>
quickycoder: Anything you make could be helpful. I think there's a couple out there in terms of machine learning that have been started already, too.
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<quickycoder>
Yes, there exist few gems but kind of old and with very basic functionalities
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<quickycoder>
I just wanted to have opinion from ruby community if it is worth doing. As, there is always option to use Weka with Jruby.
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<tyoc213>
I have self.thing(arg1, arg2, arg3) which I used in my code and was working OK, now I want to change it to self.thing(arg1, arg2, arg3, extra1=0, extra2=0) but the places where it was called shows: NameError: undefined local variable or method
<tyoc213>
are "default" arguments not supported in self.methods ?
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<amh345>
I'm trying to write an xml file with Open3.popen3. i kept getting an error "\xC3" on US-ASCII which had me stumped until i found the string. basically it's got an accent > é . how can i escape that so it doesn't cause everything to choke and die?
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<amh345>
the xml file is being constructed with x = ERB.new(<<END).result(binding)
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<amh345>
got it. stdin.write x.force_encoding("utf-8")
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<shevy>
ugh
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<tjbiddle>
Hey guys - I can't seem to find it anywhere. For to_proc - Does 'Proc' actually stand for anything?
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<Kelet>
tjbiddle, procedure
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<Kelet>
Although the concept of a 'proc' in Ruby is sort of disconnected as compared with the concept of a 'procedure' in a language like Pascal.
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<tjbiddle>
Kelet: I'll be sure to read up on that, thank you!
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<tjbiddle>
For whatever reason the syntax for some topics relating to Proc are hard for me to grasp. Anyone recommend a good source that explains it well?
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<zendeavor>
it's a bit buggy atm though
<havenwood>
invsblduck: Installing chruby and ruby-install should do the trick. Then just: ruby-install ruby 1.9.3
<invsblduck>
havenwood: rad, thank you.
<havenwood>
invsblduck: To get latest 1.9.3 patchlevel ^
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<invsblduck>
havenwood: zendeavor currently i have ruby-1.9 installed from aur (which names executables ruby-1.9, gem-1.9, etc). i'm going to do this right!
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<spider-mario>
pacaur uses cower as well
<spider-mario>
I like pacaur
<zendeavor>
meat is the most sane cower wrapper, and cower is the most sane aur-helper
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<invsblduck>
+1
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<invsblduck>
never personally used pacaur though
<zendeavor>
it's passable.
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<invsblduck>
zendeavor: better than bannable :)
<zendeavor>
i lied about that, yaourt *almost* isn't complete garbage anymore
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<zendeavor>
it would be preferable if we could banish it from every arch tutorial and recommendation list on the WWW though
<havenwood>
haha
<shevy>
hehehe
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<zendeavor>
for several years, yaourt was *really* effing bad. like, #archlinux had daily reports of "i -Syu and my system broke!!!! arch is so broken!!!"
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<zendeavor>
when in fact it was yaourt, which they had aliased `pacman=yaourt'
<shevy>
where were we if we would not have package managers ...
<zendeavor>
yaourt is just a pacman wrapper
<zendeavor>
pacman is the only package manager on arch
<atmosx>
yaourt is a greek variant for yogurt
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<atmosx>
get your facts straight kids
<atmosx>
brb
<zendeavor>
it's also a french bash script
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<invsblduck>
hahaha
<atmosx>
how can a bash script be French?
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<zendeavor>
it originated in france?
<atmosx>
oh
<atmosx>
tha
<atmosx>
t
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<atmosx>
but if it's originated in France but it's written in English by a Russian guy with Brazilian mother?
<atmosx>
brb
<MrZYX>
hm, never had an issue with yaourt
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<zendeavor>
oh the *biggest* problem with yaourt still remains; it's distributed in an unofficial repository [archlinux.fr], which also is full to the brim with unmaintained, broken, old, outdated *official* packages and _also_ pre-built aur packages
<zendeavor>
they don't sync with the tier-ones
<shevy>
that's it
<shevy>
I am going back to windows
<zendeavor>
bye
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<MrZYX>
well, I always build it from the aur by hand on a fresh arch
<zendeavor>
and for the competent user, yaourt is perfectly suitable as long as you're vigilant.
<devth>
anyone aware of a json api for ruby docs? kinda surprised it's not built in to ruby-doc.org
<zendeavor>
it's the "noobs" that cause the problem.
<shevy>
noobs vs. wise people is a function of the invested time
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<zendeavor>
hence, "quotes"
<MrZYX>
well, noobs vs. arch almost always cause problems
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<zendeavor>
yet they flock to us
<MrZYX>
not sure I'd blame yaourt
<zendeavor>
huh?
<shevy>
they should just use ubuntu
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<aedorn>
They should use Slackware.
<zendeavor>
no, no one blames yaourt anymore; there was a time in the past when it *was* to blame, but that time has past
<zendeavor>
s/past$/gone/
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<MrZYX>
you kinda did earlier :P
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<zendeavor>
in times of yore, that was a serious problem.
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<zendeavor>
yaourt has always been advertised as a great alternative to using pacman directly; back as few as 2 years ago, it could potentially murder your system and package database
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<zendeavor>
and often did; whose fault? surely the invoking user, right?
<suffix_>
is it possible to grep for a large body of text?
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<suffix_>
(like, severa.l dozen lines)
<zendeavor>
grep is kinda single line-based
<MrZYX>
but what's the point if it's working good now?
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<MrZYX>
arch users living in the past are so confusing...
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<suffix_>
so what can I do to search for several dozen lines?
<zendeavor>
no one's in the past here pal
<aedorn>
As confusing as FreeBSD users?
<zendeavor>
pacman wrappers are still a bad idea, forever.
<zendeavor>
that means today too.
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<invsblduck>
aedorn: <3 FreeBSD.
<shevy>
suffix_ try .grep or .match
<MrZYX>
yet all your arguments are "two years ago yaourt was bad"
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<MrZYX>
therefore don't use it today
<shevy>
suffix_ or .scan :D
<suffix_>
shevy someone just said grep was for single lines
<zendeavor>
this is side commentary
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<zendeavor>
"don't use it today" is valid, because pacman wrappers are always and forever a Bad Idea™
<aedorn>
invsblduck: It's great. It's also the only OS where the idea of simplifying something is usually rejected in favor of a more complex solution. MPD4 vs MPD5 is a good comparison for that.
<shevy>
suffix_ you can use multiline regexes in .grep
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<shevy>
suffix_ best, give a minimal example that you need
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<aedorn>
And it's further scary that using php to configure a FreeBSD system is actually easier than the regular FreeBSD install is.
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<zendeavor>
"why not to use yaourt" is because it has an awful track record and been historically fragile; as a result, i must err on the side of caution and say for simplicity's sake, don't use yaourt
<zendeavor>
don't put words in my mouth man, it's not polite.
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<zendeaver>
I would never!
<shevy>
lol
<suffix_>
shevy ?
<invsblduck>
hah
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<shevy>
suffix_, no that was a reply to havenwood
<suffix_>
ok, so what should I do
<shevy>
suffix_ I cant open the pastie right now, I somehow broke both firefox and chrome ...
<aedorn>
I wish my problem was something Ruby related... I'm so tired of troubleshooting random system instability due to motherboard problems nobody can track down.
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<shevy>
aedorn yeah
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<invsblduck>
aedorn: last time i touched a mobo was in a $20k HP server 4 years ago :P
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<invsblduck>
aedorn: i forgot those things even existed ;p
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<invsblduck>
aedorn: that sucks
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<invsblduck>
i think the last time i had a mb problem on my pc was in the 90's
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<invsblduck>
suffix_: checksum?
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<suffix_>
invsblduck what's the complexity of that operation>?
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<devth>
havenwood: thanks, but i meant a json api to look up things in ruby docs
<invsblduck>
suffix_: require 'digest/md5'; sum = Digest::MD5.hexdigest(block_of_text);
<invsblduck>
suffix_: or some crap like that
<suffix_>
invsblduck what is the running complexity of that operation
<havenwood>
devth: Ooooh, I couldn'ta been much further off, ha.
<invsblduck>
suffix_: but i don't know what you're trying to do; that could be a horrible idea.
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<havenwood>
suffix_: this == that
<invsblduck>
suffix_: if you're trying to manage file contents (configuration management), the general procedure is: Verify the file checksum, then replace the file contents if the checksum is wrong.
<suffix_>
I need to check a log file to see if the proper output exists
<suffix_>
I do not need to check every value in the log
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<suffix_>
so checksum will not work
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<havenwood>
suffix_: So you want to see if the log includes a particular substring?
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<suffix_>
several substrings
<suffix_>
over 20
<invsblduck>
suffix_: then just use a multiline regex
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<suffix_>
invsblduck example?
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<invsblduck>
suffix_: use the /m and/or /s modifiers
<havenwood>
suffix_: does it have to include all substrings or just one?
<suffix_>
havenwood all
<suffix_>
invsblduck I am reading that one
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<suffix_>
why are there two sets of parenthesis here message.match(/(From:.*Subject.*?)\n/m)[1]
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<aedorn>
suffix_: So it retains the match as a back reference
<suffix_>
aedorn what does that *mean*
<invsblduck>
suffix_: man perlretut
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<invsblduck>
/Backreferences
<suffix_>
why would I ever do such a thing. I DON"T WANT TO READ MORE THAN I HAVE TO JUST TELL ME JESUS CHRIST I FUCKIGN HATE IT WHEN PEOPLE DO THAT STUPID MAN / GOOGLE SHIT
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<aedorn>
It means that it matches that pattern and stores it into a variable
<zendeavor>
oh?
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<suffix_>
thank you
<zendeavor>
"stop trying to teach me, just feed me results"
* havenwood
blinks.
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<suffix_>
that's such a piss poor assumption
<tjbiddle>
suffix_: It won't be stupid when you learn it more in depth and can help contribute back later and/or ask less questions in the future.
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<shevy>
suffix_ one of these () seems to be a capture group, so it should store the match in the variable $1
<suffix_>
I'm learning the specific material i need to accomplish this goal. I could give a fuck less about information that is unnecessary to completing my goal
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<mechanicalduck_>
oh
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<mechanicalduck_>
ah right
<mechanicalduck_>
x86_64-linux
<mechanicalduck_>
this means it can run 64bit and also for compatibility 32bit
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<mechanicalduck_>
OK
<mechanicalduck_>
what is a gemset
<mechanicalduck_>
I mean, there is a plugin for gemsets for rbenv
<mechanicalduck_>
Is it something artificial shimlike? Or is it a native ruby construct?
<Demo_of_doom_>
why do you guys dislike PHP?
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<zendeavor>
php-sadness
<banisterfiend>
Demo_of_doom_: I havne't used it, but from what i've heard and seen it appears to be a poorly designed language with an ecosystem populated primarily by amateurs
<havenwood>
Demo_of_doom_: I more disregard PHP than dislike it.
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<mechanicalduck>
Ah, and of course puppet
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<zendeavor>
nuuuuu puppet
<mechanicalduck>
you also want to manage your infrastructure, a good base
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<mechanicalduck>
zendeavor: bash scripts? yikes
<zendeavor>
chef?
<MrZYX>
it's his first language, do you really think he needs to manage any infrastructure with it... (I hope not)
<mechanicalduck>
but don't try Zend Framework
<zendeavor>
not at all
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<mechanicalduck>
they will hurt you, in that channel for Zend Framework you will be reported if you ask too much
<havenwood>
Chef and Puppet are for fancy big city folk!
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<tjbiddle>
I need to find some time to play around with Chef - But I do contract DevOps as well as lead it for my employer currently - So if you need any help with Puppet let me know Demo_of_doom_ :-)
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<tjbiddle>
Also the guys in #puppet are awesome :-)
<zendeavor>
will you subcontract me
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<mechanicalduck>
havenwood: I am still new to puppet, but I like it very much that one can rebuilt the infrastructure with all those best practice additions (hardening, removing junk, etc).
<tjbiddle>
zendeavor: PM me details
<mechanicalduck>
havenwood: you know, when you freshly installed a box you start tidying it up, making it more secure. and all this would have to be repeated if you have to rebuild / migrate it. But when using puppet you can document your changes and it would apply them for you.
<zendeavor>
i don't have any details
<Demo_of_doom_>
thanks for the info, so is puppet for php or ruby?
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<havenwood>
mechanicalduck: Aye, i've started studying up a bit but am still manually doing my EC2 instances like the olden days. :O I've started playing around but not using either in production yet.
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<mechanicalduck>
puppet is for setting a system up. scm = software configuration management. it is responsible for installing e.g. a webserver (apache2) and its modules (php) and database (mysql) and the user stuff etc
<MrZYX>
Demo_of_doom_: don't care about puppet right now
<havenwood>
Demo_of_doom_: Puppet and Chef are DevOps stuff. They happen to use Ruby, but they are for deploying anything at all.
<havenwood>
+1 don't care right now
<mechanicalduck>
Demo_of_doom_: right, it is only possible having shell access.
<mechanicalduck>
Demo_of_doom_: probably you already got some management software installed, so you should concentrate on the basic stuff first.
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<mechanicalduck>
Demo_of_doom_: http basics, html, semantics, stylesheets, javascript, progressive enhancements, fallbacks and all this funny ui stuff
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<havenwood>
Demo_of_doom_: TryRuby.org is a great start!
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<mechanicalduck>
Who knows Zend Framework (1/2)?
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<MrZYX>
Demo_of_doom_: +1 to tryruby.org, that should give you the syntax basics. Then try the ruby koans. after that try to think of a task you do regularly and try to use ruby to automate it
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<tjbiddle>
Demo_of_doom_: Before you worry about anything for managing infrastructure - if you get into any webapps then check out Heroku. You get a free dyno to host on so long as you don't scale above that.
<tjbiddle>
That way you can just play around with things without having to iron out all the specifics.
<mechanicalduck>
Heroku, can one also install a local Heroku?
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<MrZYX>
heroku just starts your appserver
<havenwood>
Demo_of_doom_: And don't forget Sinatra when you want to start with web apps: http://www.sinatrarb.com
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<tjbiddle>
mechanicalduck: Eh? Wouldn't really see the point.
<havenwood>
mechanicalduck: You just run your web server locally.
<tjbiddle>
mechanicalduck: I mean sure - You can spin up rails or whatever in production mode, setup a reverse proxy in nginx to that port and voila
<havenwood>
Puma, Unicorn, Thin, whatever
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<mechanicalduck>
so Heroku is a collection of lx containers + reverse proxy in front?
<havenwood>
Nginx and Unicorn sitting in a tree, K-I...
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<mechanicalduck>
lol
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<bricker>
Why does 'nil' give a different error for #id than 'true' or 'false'?
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<MrZYX>
because you use rails 3, most likely
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<bricker>
Oh you're right, I forgot I am in a rails console
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<xybre>
bricker: activesupport-3.2.13/lib/active_support/whiny_nil.rb @ line 20
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<MrZYX>
18>> nil.id
<eval-in>
MrZYX => /tmp/execpad-bdab5b50614b/source-bdab5b50614b:2: warning: Object#id will be deprecated; use Object#object_id ... (https://eval.in/40379)
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<MrZYX>
heh
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<tjbiddle>
xybre: Oh that's really cool! Not sure if it's necessary - but I like the syntactic sugar on it :)
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<xybre>
tjbiddle: look at the souce its pretty small and is really clearly written, it pretty much just encapsulates what you're doing and adds a couple of features.
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<sqrrl>
(i know little about ruby and ask out of curiosity) how are ruby's hash made? i've been told one can use strings/objects as hash keys and can modify these objects. how does this work?
<havenwood>
^ That is quite concise. Read it first then ask. :P
<sqrrl>
please, i want to know how is this one thing done
<havenwood>
>> {'instructions' => 'stop being a help vampire'}
<sqrrl>
either ruby copies objects, or it doesn't accept strings as keys, or does some magic
<eval-in>
havenwood => {"instructions"=>"stop being a help vampire"} (https://eval.in/40393)
<sqrrl>
the answer is simple
<sqrrl>
i don't want to learn ruby
<havenwood>
homework?
<sqrrl>
curiosity!
<sqrrl>
do you, or do you now, know the answer?
<havenwood>
yes
<havenwood>
>.>
<sqrrl>
if i knew ruby, and if you asked me this simple question, i'd just simply tell you the answer
<sqrrl>
it doesn't mean nothing, but still.
<havenwood>
sqrrl: the key would be a string of a different object_id than the original string, if I get what you're asking
<sqrrl>
you mean, a copy?
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<sqrrl>
or something along a copy-on-write thing?
<havenwood>
a dup
<sqrrl>
a dup is a system call
<havenwood>
yeah, most ruby methods map back to system calls
<havenwood>
Kernel methods at least
<havenwood>
*
<sqrrl>
a kernel call for each key?
<havenwood>
sqrrl: I don't think I quite get what you're asking, really. No, gah.
<sqrrl>
thanks god
<sqrrl>
what's a “dup”
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<havenwood>
There must be a good writeup on Ruby String objects somewhere. Its just normal Ruby string behavior.
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<havenwood>
sqrrl: If you know C, take a peek behind Hash. Links to code in docs.
<sqrrl>
ok, now let me say something
<sqrrl>
i appreciate your input, but
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<havenwood>
what are you even asking? if you don't want to understand Ruby it is a rabbit hole to explain Ruby's object system
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* havenwood
flees.
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<sqrrl>
if someone comes and asks a question of more than 10 words, and it looks at least remotely sane, and you don't know the answer to this question—especially when you don't understand the question—don't, i repeat, *don't* answer it
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<havenwood>
sqrrl: Sometimes when questions are gibberish you can decipher meaning by prodding.
<havenwood>
sqrrl: Not in this case.
<sqrrl>
i usually ask to elaborate
<sqrrl>
anyways, python is simple: don't allow changeable (mutable) objects as dic (=hash) keys
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<sqrrl>
just wanted to know how ruby goes about this, since keys can be (can they?) be modifiable
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<havenwood>
sqrrl: you can remove a key value pair and make a *new* key with the old key's value - i don't know what all you know
<sqrrl>
ok, found the answer
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<sqrrl>
you can't have modifeable stuff for keys
<sqrrl>
strings are copied and frozen
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<havenwood>
i *thought* you were asking if a string, used as a key, was the same object as the original string
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<IceDragon>
sqrrl: just overwrite the Object's #hash method and you can use it as a Hash key.
<sqrrl>
havenwood, and then you went ahead and wrong something about kernel calls.
<Speed>
question: how do ruby gems create bindings to C++ libraries with "relations"
<Speed>
let's say I have a Sprite class that has a member called Tone
<Speed>
so I want to properly map this in ruby
<Speed>
sprite.tone.r = 100
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<Speed>
t = sprite.tone
<Speed>
etc.
<Speed>
the problem arrises when I set sprite.tone to a variable, then that sprite is deleted
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<havenwood>
sqrrl: Take ten minutes to learn the very basics before taking to IRC, so you can at least ask intelligible questions. Your final question was fine, sane, and answerable.
<Speed>
the tone then points to invalid space
<havenwood>
sqrrl: I quote: "either ruby copies objects, or it doesn't accept strings as keys, or does some magic"
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<havenwood>
Grrr...
<sqrrl>
havenwood, i described a problem and asked "how it worked"
<sqrrl>
dunno what's unclear about this :3
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<pzuraq>
I need a data structure that manages ranges of integers, such that each range is distinct
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<pzuraq>
for instance if I add a range that overlaps another range, it will merge the two
<sqrrl>
and how's that quote a question orz
<pzuraq>
and then I need to be able to loop through each of the ranges and do something with each endpoint of the range
<havenwood>
Was hard to tell what element of how it worked you were looking for, hence pointing you to docs in hope you can clarify. "Can I mutate a String that I'm using as a key" would make sense. An easy "no".
<pzuraq>
anyone know of anything like this? The best thing I found is an interval-tree gem but it doesn't appear to have the ability to add ranges or loop through the ranges in the structure
<havenwood>
sqrrl: ^ anyways, forget it. I'm off for a brew.
<sqrrl>
well, i was told i could do that
<sqrrl>
i was told a lie
<havenwood>
damned lies
* sqrrl
decides to feel sorry
<sqrrl>
i hope that makes you feel better
<havenwood>
sqrrl: You can mutate the heck outta Hashes, but not that way. An interesting gem that has a non-mutatable Hash is Hamster: https://github.com/harukizaemon/hamster
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<havenwood>
sqrrl: I'm prolly talking half gibberish anyways, have altitude sickness and and off O2 atm. :P
<sqrrl>
i'd ask about how i could mutate the heck outta hashes, but don't want to strain your patience and do want to sleep just a tad too much
<sqrrl>
are you in the mountains or sth
<pzuraq>
ok, I'm going to write this structure myself by extending array
<pzuraq>
how would I add an object to an array from within the class itself
<pzuraq>
?
<sqrrl>
pzuraq, you do that
* sqrrl
simply dies
<havenwood>
Never occurred to me that Breckenridge would make me this ill, and make it so hard to think. Apparently I can't *do* altitude.
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<popl>
havenwood: How long have you been there?
<popl>
havenwood: It takes some time to acclimate.
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<havenwood>
popl: Yeah, yesterday I thought I was gunna die, and had to have EMS give me oxygen. Today i'm kinda better, not having skipped heart beats and can eat.
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<popl>
havenwood: You probably over-exerted yourself.
<havenwood>
popl: Was been here 2 days, was in Vail 1 before that. Seems i'm finally getting accustomed, now that i'm nearing leaving on Sun. :P
<pzuraq>
rather, how do I reference the objects in an array from within the array?
<popl>
havenwood: It usually takes a few days to a week or so, depending on an individual's overall level of health (IME).
<havenwood>
popl: Dang, I'll be gone before I acclimate.
<popl>
What's the altitude of Breckenridge?
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<havenwood>
pzuraq: Sounds like `self` (if you mean opening up a class and within a method referring to the instance of the class).
<popl>
says the guy on the Internet
<havenwood>
popl: Just under 10,000 ft. I didn't think it would bother me.
<pzuraq>
havenwood: Ok, cool, will try that
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<popl>
havenwood: Did you do anything exhausting while getting there? Did you not eat properly? Probably a lot of little things adding up.
<popl>
havenwood: Or maybe you have an undiagnosed heart condition. :P
<onewheelskyward>
People get altitude sickness a lot lower than 10,000 ft.
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<havenwood>
popl: I was coming off a bug when i came here. I think it just got the best of me.
<popl>
onewheelskyward: indeed
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<popl>
havenwood: that could absolutely be it
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