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<ramfjord>
totimkopf: what are you hoping recipe_for_cake will be?
<ramfjord>
ditto for recipe_for_chicken
<ramfjord>
name error because they aren't defined anywhere
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<totimkopf>
ramfjord: ah, true, I guess the code wasn't supposed to work
<totimkopf>
I thought that it would magically do something with the @recipes array...
<totimkopf>
the book does hint that it should do something other than error
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<ramfjord>
totimkopf: could it have defined those earlier? They seem to need to respond to :main_ingredient, so it would make sense if the book defined a Recipe class earlier
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<shevy>
code code code
<shevy>
we need less code
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<ramfjord>
shevy: that's what high level languages are for, right?
<shevy>
ramfjord well, one still writes quite a lot of code in them
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<shevy>
*specify
<shevy>
I'd like to specifcy code differently
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<shevy>
do you guys do rather this:
<shevy>
hey
<shevy>
foo = array[0]
<shevy>
or
<shevy>
foo = array.first
<shevy>
?
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<havenwood>
shevy: i prefer a method without arguments, except for example for uniformity like [0] when it's next to [1] and [2]
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<rubie>
hi all: im having a hard time wrapping my head around calling functions in different methods, not sure why this goes into an infinite loop would someone mind taking a look? https://gist.github.com/gabrie30/4aff1e53ee867dbf2143
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<shevy>
havenwood so you would use .first in the example above?
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<havenwood>
shevy: yeah, i would
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<shevy>
ok
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<afhammad>
rubie: you are doing "if true" instead of "if prime?(i)"
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<afhammad>
rubie: "if true" will always be true, i will never increment, hence infinite loop
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<rubie>
i thought this would check if_prime(i) to be true
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<rubie>
ahhh
<rubie>
but wouldn't go on to the next step
<afhammad>
no, you can either do "if prime?(i)" or "if prime?(i) == true"
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<rubie>
oh gotcha so it never goes to i +=1
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<rubie>
perfect thank you!
<afhammad>
rubie: :)
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<shevy>
lol
<shevy>
rubie, now that was a slipup you must remember for the rest of your life:
<shevy>
if true
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<shevy>
"Hey, I thought it would check for the size of the universe, and return 42!"
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<rubie>
lol, yes that is something i won't ever forget
<shevy>
\o/
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<rubie>
newbs....
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<mbuf>
pontiki, I am able to roll log files, but, I would like to take a dump of the log files, every day
<pontiki>
what does that mean?
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<mbuf>
pontiki, I have @logger = Logger.new(file, 10, 1024 * 1024)
<pontiki>
ok?
<pontiki>
are you talking about emulating linux's logrotate thing?
<mbuf>
pontiki, so, I get about 10 logs, but, that keeps rotating right? like a circular buffer
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<mbuf>
pontiki, I want to take a snapshot of the 10 log files every day, zip them and store them to a different network folder (say)
<rpag>
"Number of old log files to keep, or frequency of rotation (daily, weekly or monthly)."
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<pontiki>
i don't know how one does that sort of thing on windows, sorry
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<mbuf>
rpag, keeping the old files will occupy disk space, I just want to take a copy of the log files, and copy them to a different folder, say a network drive
<mbuf>
rpag, log rotation will override the log files, right?
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<pontiki>
if you use the numeric shift_age, yes
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<sigurding>
good morning, is there any way to avoid the installation of ruby-dev when using JSON in ruby?
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<pontiki>
if you set it to 10, there will only ever be at most 11 log files (1 current, 10 old)
<rpag>
json lib ships with ruby btw so you shouldnt need ruby-dev unless youre installing the gem and compiling C srcs
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<sigurding>
rpag: ok from which version on?
<rpag>
1.9+ as far as i know
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<sigurding>
rpag: hm I am using require “json” but it forces me to install make/ruby-dev on ubuntu, when doing bundle install
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<workmad3>
sigurding: it sounds like you've got one of them in your Gemfile for this project
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<pontiki>
workmad3: o/
<workmad3>
pontiki: </sarcasm>? ;)
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<pontiki>
well, no, not in that case :/
<rpag>
sigurding, yes it sounds like what workmad3 says, you've got "json" gem in your Gemfile
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<tmoore>
sigurding: why don't you want to install ruby-dev?
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<sigurding>
tmoore: I like it, when my gems have a minimum footprint
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<bulters>
hi! Question: I want to define a module (empty) based on a string (say "MyNamespace")
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<bulters>
and later on execute some code in that module based on the same string... any ideas how to pull this off without resorting to eval(all_the_things)?
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<rpag>
const_set(str, Module.new {}) im not sure about the last part
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<rpag>
maybe module_eval
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<a_>
array.find(:predicate?) # returns the first element where element.predicate? is true -- how can I best return the first element where predicate?(element) is true, instead ?
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<rpag>
use a block
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<a_>
rpag: wasn't sure if there was a shorter way of doing it
<aep>
dependency.rb:298:in `to_specs': Could not find 'bundler' (>= 0) among 14 total gem(s) (Gem::LoadError)
<aep>
any idea why i get this when starting sinatra from systemd instead of shell?
<rpag>
there's not
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<aep>
ruby is from the system, bundler as a gem
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<aep>
so i added ~/.gem/ruby/2.1.0/bin/ to the path
<tmoore>
a_: sorry I think that should be array.find(&method(:predicate?))
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<tmoore>
aep ~ is probably a different directory for you than the user systemd is running as (presumably root)
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<lolmaus>
Is there syntactic sugar to reduce "foo = defined? bar ? bar ? baz" to something like "foo = bar || baz", that would not fail if "bar" is not defined?
<aep>
tmoore: both root
<aep>
oh wait, systemd might screw up HOME
<aep>
that's probably it
<workmad3>
lolmaus: don't write code that condititionally defines local variables? :/
<a_>
tmoore: awesome - how does that work?
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<tmoore>
method(:predicate?) searches for a method named :predicate? in the current scope
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<tmoore>
you can also call it on an object some_object.method(:foo) looks for a method called :foo on some_object
<tmoore>
it returns a proc that calls the method on whatever arguments you pass it
<tmoore>
then &proc converts the proc to a block
<aep>
yep that was it, thanks tmoore ~
<tmoore>
no worries... glad it's working :-)
<workmad3>
tmoore: it returns a Method object rather than a Proc btw
<bulters>
rpag: thanks, will try it out
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<tmoore>
ah right yes thanks workmad3
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<rpag>
what does '~' on its own mean?
<workmad3>
rpag: binary not iirc,
<workmad3>
tmoore: or, if you wanted to unify the terms, procs and methods are both callables ;)
<tmoore>
and &object actually calls object.to_proc and converts that to a block I think
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<rpag>
i mean on IRC :)
<lolmaus>
workmad3: i was gonna use it in Rails for instance variables defined from controller. And Rails would not crash on an undefined variable somehow. E.g. `puts @undefined_var || "foo"` woult print "foo" in Rails.
<rpag>
instance variable look up doesnt raise a NameError just returns nil
<rpag>
aep, what does '~' mean as a smiley?
<workmad3>
lolmaus: that's ruby not throwing exceptions on undefined instance variables
<workmad3>
lolmaus: which has always been the case
<lolmaus>
workmad3: rpag: oooh, thank you.
<workmad3>
lolmaus: that's not rails
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<workmad3>
rpag: no idea on IRC ;)
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<aep>
rpag: i mistyped !
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<rpag>
oh okay, i seen someone else do it and i presumed it was a thing
<workmad3>
aep: y u no use a mac? :(
<aep>
probably they mistyped :P
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<workmad3>
aep: it's great how the specific typos people make can reveal stuff about their kb layout and their hardware ;)
<workmad3>
aep: the top-left key of the main block on all the macs I've seen has been the crazy § character rather than a ~
<rpag>
§
<aep>
workmad3: because i work on embedded devices. with ruby. its awesome
<workmad3>
aep: :D
<aep>
actually i have a mac next to me and the layout is the same
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<rpag>
± and § here
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<tobiasvl>
wow, caret on 6. I guess the NO keyboard is pretty weird then, we have & there.
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<workmad3>
tobiasvl: it's ^ on 6 and & on 7 for british
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<workmad3>
also, I have 3 different ways of producing §... §, alt+§, and alt+6...
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<hrrz>
hey, i'm trying to make a postgres query using ruby, i'm doing an "where in" query but i fail to pass an array
<hrrz>
here's my loc: @conn.exec("select * from tags where lower(title) in ($1)", keys)
<hrrz>
as keys = ["title1", "title2"] etc..
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<hrrz>
PG.connect object
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<toretore>
hrrz: what is @conn ?
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<toretore>
from where?
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<hrrz>
toretore: pg gem
<Aova>
morning :)
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<toretore>
hrrz: well, first of all, it looks like it expects an array of params as its second argument
<toretore>
so your array should be the first element of this array
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<hrrz>
so how can i pass all the elements of the array?
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<maasha>
What is the fastest way to parse a CSV table so that data types are automagically converted? ie. not everything as strings, but integers as Fixnum and floats as Float etc.?
<maasha>
It turns out to be non-trivial
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<maasha>
scanf is no-go -> too slow. Same with Integer and Float.
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<workmad3>
maasha: I believe you can pass an array of converters to CSV.new
<workmad3>
maasha: I believe what happens is that CSV attempts to use each converter in turn and the first non-error is determined as the converted result... but I'm not confident on that so you should probably check it out ;)
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<workmad3>
maasha: however, if it's a case of the conversions are too slow... not sure what to suggest there... you're dealing with string-parsing operations after all
<maasha>
workmad3: I suppose what I am after is an updated version of scanf!
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<maasha>
like the C version of sscanf
<tobiasvl>
yeah, I was interpreting the problem as it being too slow to check for type in every field, which is not surprising, so converters should help with that (it'll know what converter to apply to each field)
<hrrz>
toretore: how can i pass the entire array? u know?
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<maasha>
hrrz: you need a ruby book
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<hrrz>
maasha: how about giving a tip rather than a useless comment?
<maasha>
useless comment? - I'd bet you that many people in here would say this is the best piece of advice you will get today.
<workmad3>
maasha: looks like your tips aren't desired anymore :P
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<maasha>
hrrz: I can suggest you a book, if you like.
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<tobiasvl>
!book
<tobiasvl>
BOOK IT
<hrrz>
maasha: you probably feel very good with yourself
<workmad3>
hrrz: seeing as it's the pg gem you're dealing with btw, it may behoove you to look up the docs for that gem
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<workmad3>
hrrz: if you're looking for specifics, I'd suggest you look through the gem docs for how to pass arrays to prepared statements
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<workmad3>
hrrz: which is another way of saying 'read some stuff about it' like maasha's suggestion, but saying 'read about the thing you're using' rather than 'read about ruby' ;)
<a_>
tmoore: a.find(&method(:predicate?)) <- why does #call get invoked, as Method expects?
<hrrz>
workmad3: it is a bit more useful
<tmoore>
a_: so the & prefix converts it to a block, passed to find
<workmad3>
tmoore: & also calls .to_proc btw
<tmoore>
yep as I mentioned above :-)
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<workmad3>
tmoore: so I'm gonna guess that Method#to_proc produces a proc equivalent to proc{|*args| method(:whatever).call(*args)} ;)
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<tmoore>
then inside find, when it yields to the block, it calls the proc
<workmad3>
tmoore: which, if true, makes it clearer how it works :)
<hrrz>
and it has less pretentious %
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<tmoore>
sounds about right
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<workmad3>
hrrz: btw, getting sarky and insulting back to regulars who give fairly normal advice to a question that, taken on its own, is a fairly trivial ruby question is likely to make people rather snappy and grumpy ;)
<eval-in__>
txdv => /tmp/execpad-0ffdb13e3de7/source-0ffdb13e3de7:2: warning: in a**b, b may be too big ... (https://eval.in/206606)
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<hrrz>
workmad3: we can argue on the 'normal advice' he suggested. But this isn't a fairly trivial ruby question, i'm sorry. It is a a PG gem question that by it docs seems that it has no normal way of receiving array as input, and i asked maybe there's a ruby way to manipulate the input so it fits the docs
<workmad3>
hrrz: yes... but that context was over 30 minutes ago in the scrollback
<hrrz>
so ?
<workmad3>
hrrz: so in isolation, your question was trivial
<workmad3>
hrrz: and that's the question that maasha answered with 'maybe you should read up on ruby a bit'
<workmad3>
hrrz: i.e. your repeat of the question didn't mention that it was pg... and that context was quite distant temporally
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<hrrz>
my secondary question was a follow up question and i was directing it to the person who helped me at the begining
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<hrrz>
the 'maybe you should read up on ruby a bit' answer was unrelated, sarky, snappy and grumpy without even understanding the context
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<workmad3>
hrrz: right... but it did come after an almost identical, undirected, context-free repeat of the same question about 10 minutes previously
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<DefV>
aww
<DefV>
I missed all the drama?
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<workmad3>
hrrz: and hell, I'm not trying to get into a big argument here... just pointing out that getting pretty insulting back isn't exactly going to ingratiate you with people :P
<rpag>
DefV, no, you can scroll back!
<tobiasvl>
hey guys, what did I miss
<DefV>
I live in the moment!
<rpag>
haha
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<txdv>
I thought everyone programming ruby is a nice person
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<rpag>
tobiasvl, something about postgres & ruby
<hrrz>
me too
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<txdv>
but then I remembered that humans are assholes
<workmad3>
txdv: nah, just the ones that the @hats haven't kicked out of here ;)
<workmad3>
txdv: or the ones like me who hide a towering, arrogant ego behind a thin veneer of civility ;)
<txdv>
everyone is an selfish asshole
<workmad3>
txdv: s/an/a/
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<txdv>
Good luck having a hang out with 881 people :D
<rpag>
workmad3, hahahaha
<txdv>
yeah, an asshole, a selfish asshole
<workmad3>
rpag: that would require people to put on clothes...
<txdv>
If i type it out loud while thinking, I get it sometimes wrong.
<rpag>
when is irc gonna move to google hangouts & webcam
<rpag>
i think thats part of the problem
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<workmad3>
rpag: you could always go and set up a public 'ruby drop-in' hangout ;)
<workmad3>
rpag: people join, ask a ruby question, insult you a bit and then leave ;)
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<workmad3>
rpag: I expect to see it set up after lunch ;)
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<bulters>
i love the insulting part
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<bulters>
would be nice to be on the receiving end of said insults
<bulters>
as some kind of psychological hardening scheme... maybe have people pay to be an insultee or something
<rpag>
if you want to be insulted like a pro, join #c
<rpag>
#ruby is usually way more mellow :)
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<bulters>
rpag: my c flamebaits are a bit rusty
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<bulters>
all I remember from uni is that using void*'s is considered a best-practice to do everything
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<workmad3>
bulters: go to #c and suggest that it's best practice to roll your own memory management by grabbing a huge void* array on program startup and then simply dealing with that internally ;)
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<rpag>
or just say 'hello'
<rpag>
that usually does it
<workmad3>
heh
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<workmad3>
I've not been to #c
<rpag>
ah im overreacting of course
<bulters>
wouldn't it be way nicer to suggest that you require help devising a partitioning scheme for said block of memory into chunks large enough to hold one result set from a not-to-be-named large scientific experiment which involves throwing really small things against each other
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<bulters>
(disclaimer: i worked for an institution that contributes to one of said experiments)
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<bulters>
damn.. #c actually has "Be civil" in the topic...
<bulters>
Guess #ruby consists of savages
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<workmad3>
bulters: #rubyonrails has MINASWAN in the /topic
<workmad3>
bulters: but not here, for some reason :(
<workmad3>
or #ruby-lang
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<workmad3>
bulters: of course, you can be civil while also being a pretentious, arrogant jackass ;)
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<bulters>
workmad3: isn't that a requirement to 'contribute' on #rubyonrails ???
<workmad3>
bulters: by 'contribute' do you mean 'answer questions from ignorant peons'?
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<bulters>
workmad3: yes
<workmad3>
bulters: well, I'm there right now doing just that ;)
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<bulters>
also lurking on #haskell, but I'm afraid to contribute since I don't have a Phd....
<bulters>
let me help you out with that ;-)
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<mostlybadfly>
Hey I'm an ignorant peon:p
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<bulters>
same here
<bulters>
I use Rails for work...
<workmad3>
mostlybadfly: ok, stand right there while I'm rude and condescending to you ;)
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<bulters>
but get paid to do research on other stuff ;-)
<mostlybadfly>
I'm trying to get to a place where I can
<mostlybadfly>
Lol workmad3
<bulters>
mostlybadfly: join a small company, and code your ass up the chain, give yourself a nice title and job description which involves research and trying stuff out to gain a competitive advantage...
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<mostlybadfly>
Yeah I need to get outta here
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<mostlybadfly>
bulters: been trying to find a job that'll let me do just that
<zwischenzug>
hello, i'm trying to do byte manipulation in ruby and it's starting to drive me crazy....wondering if someone could help me out
<mostlybadfly>
Seems like here all they ever go with are bootcamp grads or the many people with prior experience
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<bulters>
zwischenzug: what are you trying to accomplish?
<zwischenzug>
i'm trying to implement the following: A = MSB(64, B) ^ t where t = (n*j)+i. a is a bitstring, and t is an int
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<zwischenzug>
and i'm trying to xor them together
<banister>
zwischenzug nerd
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<zwischenzug>
so far i have (caution: this is really ugly): a = b.slice(0..6) + [(b[7].ord ^ t).to_s(16)].pack("h*")
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<zwischenzug>
sorry.....it's actually: a = b.slice(0..6) + [(b[7].ord ^ t).to_s(16)].pack("H*")
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<zwischenzug>
but this doesn't work, because at the end, if the hex string is single digit, and it gets packed into H*, the endian-ness gets flipped
<endzyme>
are there any good materials online around best practices for installing ruby based applications on an OS. Example, looking to package a grape-api app so it can be installed and startable as a service. Currently using fpm but having concerns on how required gems get installed and included.
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<workmad3>
endzyme: you could look up omnibus
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<workmad3>
endzyme: pretty much, yeah
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<zwischenzug>
i need something that returns ["09"] and ["a9"] respectively (or an entirely different approach since this seems like a huge hack)
<endzyme>
workmad3: have you used it before? Im curious if it's hard to maintain
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<workmad3>
endzyme: I've not created my own omnibus packages... I've installed the chef packages, which are omnibus and it makes installation pretty damn easy :)
<workmad3>
endzyme: afaik, the creation of the packages is geared around being scriptable pretty easily though, so it shouldn't be problematic to maintain
<endzyme>
workmad3: cool - thanks! I'll poke around -
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<machty>
sanity check: does Ruby internally trap all (non-terminating) signals, and _then_ check if the running ruby code has registered trap handlers?
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<machty>
i'm asking because i just realized that even if you don't trap a signal, a SignalException will be raised
<machty>
i was previously expecting the process to terminate if you didn't trap it for, say, SIGINT
<machty>
but Ruby gives you one last chance to catch it as a raised exception
<machty>
sorry, talking out loud here, it's my ah ha moment of the day
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<workmad3>
shevy: pretty sure 'aliens' are already included... I believe there's a section of unicode marked for klingon ;)
<shevy>
who referred to that no-content article above
<csmrfx>
lol
<csmrfx>
its like a hot-rod mechanic wrote an article on which guitars are best for classical music
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<shevy>
well there are crappy guitars
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<shevy>
I know because I bought one of them :(
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<workmad3>
csmrfx: and then based his opinions on what a particular rock-star decided to use ;)
<shevy>
also, playing piano is much simpler than playing the guitar, I found that out as well
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* csmrfx
buys a new bass guitar every 3 months
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<shevy>
what happens to your old bass guitar?
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<csmrfx>
if its good it sits on the stand
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<shevy>
there could be zombies in pubs
<shevy>
I learned that from shaun of the dead
<shevy>
plus, my british accent
<workmad3>
shevy: I dread to think what your british accent is likey :P
<workmad3>
*like
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<shevy>
likey blimey slimey
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<naftilos76>
hiyosi, i am using daemons gem to make my ruby script a daemon but i cannot find a way to get the pid number of the process although i can see the pid number in tasks manager in ubuntu. The pid file is nowhere to find. The dir of the script does not contain anything and the /var/run/ does not either. Can anybody help?
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<naftilos76>
That was to everyone in the channel
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<gizmore>
naftilos76: maybe Thread.current.inspect has it?
<suy>
naftilos76: I mean, Process.pid contains... the pid of the process, no?
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<naftilos76>
suy: Thanks man, simple as that Process.pid did the job
<naftilos76>
i want that so that i can terminate at any time
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<olivier_bK>
can i sign in on website with nokogiri it's possible ?
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<jeer>
Does anyone know if there is an alternative to SSLv3 for rest_client?
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<jeer>
3rd party product we paid for decided to dump SSLv3 with zero notice/notification and now we have a warehouse of employees with nothing to do because of this.
<jeer>
Sidenote, Bigcommerce is cancerous.
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<axilla>
jeer: tls
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<jeer>
but does rest_client support tls?
<axilla>
all of the rest clients our app integrates with switched to tls, and turned off sslv3
<axilla>
oh not sure about rest_client?
<axilla>
sorry
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<jeer>
Yeah, I don't think the dependency chain we have has a solution for this unfortunately.
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<workmad3>
jeer: it looks like you can pass an :ssl_version to the rest-client constructor
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<workmad3>
jeer: valid values are held in OpenSSL::SSL::SSLContext::METHODS
<workmad3>
jeer: I'd suggest using :TLSv1_2 if possible
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<jeer>
Looking for exact syntax now. Thanks for the lead, work.
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<explodes>
I doubt this is the best channel for it, but I don't know where to start. I'm on OSX 10.9, I used homebrew to install openssl. Recently, I upgraded to 1.0.1j, and now using the CLI to connect to Heroku breaks talking about SSL errors.
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<mistermocha>
question about class vars ... my understanding is that @somevar should be accessible throughout the class, but what about on the instance? (ex https://gist.github.com/mistermocha/5dc34f962bc55ce48109 ... see comments)
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<Hanmac>
mistermocha: hm it does works for me
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<Hanmac>
hm sorry
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<mistermocha>
Hanmac: ??? yeah that's weird ... I would expect that to work, but I get errors on those puts statements.
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<mistermocha>
Hanmac: I read up on attr_accessors, but the docs I found said that I needed to do @@two_at_symbols ... and I just wanted to understand more
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<Hanmac>
mistermocha: you need attr_reader or attr_accessor
<mistermocha>
thanks!
<Hanmac>
NO ... attr_* functions has NOTHING todo with @@vars
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* mistermocha
nods
<Hanmac>
let me guess you come somehow from Rails right?
<mistermocha>
no, I've been exclusively a python dev for the last several years, and exclusively perl for several years prior
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<mistermocha>
I'm just picking up ruby
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<mistermocha>
speaking of python... inheriting from object brings about the full datamodel, which has tons of fun built-in hooks for overriding basic methods on functions. Is there similar practice in ruby?
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<j2p2>
yeah
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<j2p2>
ruby's kind of a lawless land as far as objects go, you can redefine anything anywhere
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<gregf_>
o_O
<mistermocha>
I get that, it's a matter of finding out what built-ins are there with new objects that I can override
<mistermocha>
e.g., is there an analogous iterable feature that can be overridden in ruby?
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<mistermocha>
and if so, how do I?
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<hadifarnoud>
how can I install a gem globally? I use rbenv
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<benzrf>
you'll get a shitload of handy methods like #map
<benzrf>
mistermocha: altho
<benzrf>
if you define each like that and then mix in Enumerable
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<havenwood>
hadifarnoud: rbenv is hardcoded to a local user install as far as i know, though you can jump though a series of hoops to get a multi-user install location i wouldn't suggest it
<hadifarnoud>
havenwood: is there anything I should add to my PATH?
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<renier>
hey, maybe someone here can throw me a hint. I use puma for a webserver. Does anyone know how to configure the ssl protocols? This is to guard against the poodle openssl vulnerability. You have to disable SSLv3. has anyone done this with any of the usual ruby web servers? (thin, puma, unicorn, etc.)
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<wallerdev>
then just handle it there
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<wallerdev>
i usually put something like nginx in front
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<renier>
wallerdev, right. I'm going to have to, unless there is a way to handle it in ruby's server config
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<TeresaP>
Is there a way to use String.ends_with? with wildcards?
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<renier>
TeresaP, use a regexp
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<TeresaP>
guh
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<renier>
TeresaP, s = "this is the end" ; s =~ /end$/
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<gizmore>
i got a funny idea... turn two balance queries (one user +=, one user -=) into a single write query statement without creating additional data
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<gizmore>
oh nvm... i feel a bit dumb now
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<csmrfx>
because this is neither rails nor db channel?
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<kombi>
..that being the complete error message, I just can't make head or tail of it...
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<kombi>
csmrfx: a much higher version of rack is clearly among them..
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<csmrfx>
well
<csmrfx>
clearly it is not a version of rack that your bundler understands
<csmrfx>
or, what is generating that error
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<csmrfx>
perhaps I need to consult a psychic here as well?
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<csmrfx>
kombi are you sure you want help? perhaps you just want to tease us with this guessing game of your problem
<csmrfx>
(or perhaps this is an excercise for psychics)
<kombi>
cwmrfx: absolutely not, and I whish I could consult with a psychic for these kind of problems myself..
<csmrfx>
anyway, I think I'll rather go read on music-theory than guess at your probs
<csmrfx>
good luck!
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<kombi>
csmrfx: c7 #11 b13
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<banisterfiend>
apeiros ping
<kombi>
csmrfx: what kind of information can I provide so it is possible to untangle for a ruby-knower? (which I am not)
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<kombi>
csmrfx: btw I recommend "The Rest Is Noise" by Alex Ross
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<csmrfx>
kombi: well, to enable others to help you
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<shevy>
kombi this means you can not have the given gem installed
<csmrfx>
^ this should happen *every* time someone asks help with code, IMO
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<csmrfx>
you would at the least need to describe what you are trying to do, which version of ruby, what OS, which libraries involved, pastie errors, source code, at the least the snippet that causes the error
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<kombi>
csmrfx: fair point! Just found out that one can install a specific version of a gem
<shevy>
the problem lies in when authors specify specific version like rack (~> 1.1.0)
<shevy>
in my opinion this is almost always abused
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<shevy>
they specify a restriction on usage of their gem
<csmrfx>
how do you mean "abused"?
<csmrfx>
"misused"?
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<kombi>
csmrfx: but it seems I've gotten past that, now fighting with errors from Redmine (a project managment tool based on R'n'R)
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<csmrfx>
kombi: great
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<sterns>
Hello, Server A is going to dump a list of 10,000 URLs (HTML pages) that need to be fetched into a mysql database. An array of worker servers will be configured to work that queue. Is ruby+Nokogiri one of the better solutions for the worker servers to perform this task? And secondly, is there a go-to solution for monitoring a work queue like this?
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<ramfjord>
which, for instance, doesn't follow redirects automatically
<epitron>
it does need a lot of cleanup though, and they should really change their HTTP backend
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<epitron>
(i recommend the 'http' gem :)
<epitron>
the documentation needs work too
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<ramfjord>
"This Gem has the worst name in the history of SEO"
<ramfjord>
haha, no kidding
<ramfjord>
I've never heard of http, might check it out myself
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<epitron>
it's much nicer than Net::HTTP
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<epitron>
one really nice thing is that it streams the HTTP response
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<epitron>
(it has a streaming HTTP protocol parser)
<pipework>
Faraday is my favorite.
<epitron>
faraday doesn't do streaming though
<pipework>
I don't know if it streams the response though, haven't looked.
<epitron>
it's surprisingly rare for them to implement that, in ruby, for some reason
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<epitron>
despite how easy it is to do with ruby blocks :)
<epitron>
http.get().each_chunk {|data| ... }
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<epitron>
oh yeah, this is what bugged me about mechanize's redirects: "agent.redirect_ok = false"
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<epitron>
what an annoying option to remember
<skullz>
Hey guys, how can I get the element that has the lowest price from those who have the biggest quantity?
<csmrfx>
you mean, the value
<skullz>
This is the hash, @total = {6=>{:price=>#<BigDecimal:5a2c178,'0.5458E2',18(27)>, :quantity=>2, :products_by_meta=>{218=>1004}}, 5=>{:price=>#<BigDecimal:59dfcb0,'0.438E2',18(27)>, :quantity=>2, :products_by_meta=>{218=>1971}}}
<epitron>
agent.redirects = true; agent.follow_redirects = false; so much simpler
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<csmrfx>
skullz: are you familiar with "ri"?
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<epitron>
skullz: i think you need a distance metric, since you have two dimensions now
<skullz>
csmrfx: nope
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<ramfjord>
or just sort by price -> total
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<epitron>
a simple distance metric is to come up with some common units
<epitron>
then do euclidean distance
<csmrfx>
ok you want to install "ri", open your terminal, and type "ri Enumerable", "ri Enumerable#sort_by" -- and perhaps "ri Hash" too
<csmrfx>
hehe, great to see #ruby still has bright and helpful people!
<epitron>
i think you want a distance metric, though
<ramfjord>
good point
<epitron>
throw a negative sign in there!
<ramfjord>
mmm
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<skullz>
epitron: is that number theory?
<epitron>
no, it's just geometry
<skullz>
mmm
<epitron>
imagine a plane
<epitron>
price on one axis, quantity on the other
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<literary>
Never mind.
<epitron>
you want to find everything in one corner of the graph
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<literary>
Figured it out.
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<epitron>
right? :)
<sterns>
ramfjord: resque looks perfect! I'm not using mysql yet, so redis will be fine. Do you have experience with any of the providers listed here : http://en.wikipedia.org/wiki/Redis
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<skullz>
yeah
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<epitron>
so, you could graph it
<skullz>
Are you talking about simplex on 2d?
<epitron>
OR, you could come up with a formula that finds the distance between points
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<epitron>
aka. a distance metric
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<epitron>
then you can sort by distance from that ideal point
<ramfjord>
sterns: I've used redistogo
<ramfjord>
it's fin
<epitron>
(the ideal point being the corner you want)
<ramfjord>
e
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<csmrfx>
the reason why I simply referred to ri -docs -- the metric I can only guess at
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<ramfjord>
epitron: why does hierarchical sort not work?
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<epitron>
ramfjord: because it's not weighing both values at the same time
<csmrfx>
which is better? 1000 of the $1 items or 400 of the $3 items?
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<sterns>
epitron: ramfjord: Do you feel that the other solutions you mentioned are superior to nokogiri for the HTML fetching? All I'm doing with the files at the moment is writing them to disk and possibly into a RDB of some kind later.
<ramfjord>
but he needs to prefer weighing quantity to weighing price
<ramfjord>
I don't think it will help you donwload files
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<epitron>
ramfjord: so he wants to buy a lot of something, and he doesn't care what it costs?
<ramfjord>
sterns: nokogiri is a html parsing library?
<epitron>
sterns: mechanize is is better than nokogiri, because it includes nokogiri :)
<csmrfx>
sterns: I once made a scraper for a huge bunch of websites with nokogiri
<csmrfx>
it worked fine
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<epitron>
mechanize is nokogiri PLUS
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<ramfjord>
"how can I get the element that has the lowest price from those who have the biggest quantity?
<csmrfx>
hm, maybe I used open-uri
<sterns>
ramfjord: epitron: sorry, I meant to refer to typhoeus / hydra
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<sterns>
which is what I'm using now
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<epitron>
hydra is good if you wanna go nuts with downloads
<sterns>
too many gem names!
<skullz>
Indeed I should be using something more clever... but it's ok for a MVP
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<epitron>
skullz: i still think you want to at least want a function that weights quantity and price
<csmrfx>
actually, your problem is simply to define a clean metric
<skullz>
the problem is, I need the most products I can get
<epitron>
-want to
<ohwhoa>
How to install unpacked ruby gem into system rubygems (without bundler and path option), also I need to put it in list when I type gem list. One solution is to install gem and then replace, but this is so shitty.
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<csmrfx>
epitron: did you use bundler?
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<sterns>
epitron: Yes, I appreciate the concurrent request etc offered by typhoes / hydra. I'm not married to using ruby for this purpose. Do you think that hydra is one of the best solutions available for this purpose, regardless of language/stack?
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<epitron>
skullz: instead of giving the user a sorted list, you could graph all the values
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<epitron>
skullz: then let them pick from a region in the chart... d3 is good for that
<livcd>
Hey guys. What is the best way to interact with a website's elements ? Like logging,clicking on buttons etc
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<csmrfx>
livcd: you mean, "scrape" a site?
<skullz>
epitron: I'm plotting this data on a table (request from client...)
<ramfjord>
skullz: If you just want an easy solution for the moment, try the code epitron or I pasted
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<livcd>
csmrfx: yeah basically
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<epitron>
sterns: i dunno... i haven't used it. downloading a lot of stuff quickly is not usually the bottleneck :) you can always throw threads at the problem in ruby
<csmrfx>
livcd: how about you read on nokogiri?
<epitron>
skullz: tell the client you found a better solution :)
<epitron>
skullz: or do both! :D
<csmrfx>
livcd: unless you need a headless browser?
<csmrfx>
for testing purposes theres many things
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<skullz>
both seems better (;
<epitron>
skullz: d3 takes a couple minutes to make work if you already have a data table
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<csmrfx>
livcd: for testing sites selenium is common, theres headless browsers like capybara
<skullz>
then it's just to pick up the right chart
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<livcd>
csmrfx: i don't think so...i need to interact with a web application which gets a stream of "items" and then i want to click on a button and fill certain forms
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<sterns>
epitron: I don't know if I'll be able to do it, but I'm hoping to be able to scale up downloading 10000 pages in about 15 seconds. I can currently do about 3000 in 15 seconds now with a single non-optimized server.
<abstrakt>
csmrfx, I think the potential issue is he doesn't want the stuff that looks like erb to be interpreted
<abstrakt>
he may want the raw text version of the file
<abstrakt>
in which case, whatasunnyday you'll need to serve those basically as static assets
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<abstrakt>
whatasunnyday, or you could try using the EJS gem to precompile them and serve that instead, either way the files will probably/basically go somewhere in your public/static assets folder
<whatasunnyday>
Sorry, let me clarify. erb :index returns a page and I just want the page as a string. Precompiling is pretty much what I want to do so I'll check out EJS.
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<csmrfx>
weird, I thought erb :index would return the page as a string 8D
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<abstrakt>
csmrfx, erb templates and ejs templates use the same basic <% %> syntax
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<abstrakt>
csmrfx, meaning erb will strip out the <% %>
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<abstrakt>
whatasunnyday, incidentally i think there's a sinatra plugin for this
<whatasunnyday>
abstrakt, o rly
<csmrfx>
ok for some reason I didn't see the javascript mention
<abstrakt>
csmrfx, if he wants to deliver the <% etc so that javascript can use that for templating instead, he'll need to use some other method of delivery
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<abstrakt>
whatasunnyday, hmm, no maybe not... I think you'll just need to use a background/watch task to run the compile task when your EJS files change
<abstrakt>
whatasunnyday, rails has automagic integration with EJS
<whatasunnyday>
okay cool, i can manage that
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<mallu>
csmrfx we are using chef template for managing a config file. When a particular service restart it update this config file which cause chef to update the file again during chef-client run. I was hoping that somehow I can have chef template ignore the lines the service update on the config file
<mallu>
csmrfx
<abstrakt>
mallu, ask #chef ?
<abstrakt>
or is it #opscode
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<mallu>
I was hoping that there is a way in ruby to ignore lines in erb
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<csmrfx>
well
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<csmrfx>
since you cannot comment them, how about using separate files
<shevy>
hmm we have .uniq
<shevy>
but do we have the opposite of it? as in, one that returns only those entries that are duplicates?
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<shevy>
let me check that
<shevy>
that does not work :(
<shevy>
no
<shevy>
oh
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<csmrfx>
well isn't that just array minus the uniques
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<mallu>
how can I escape : ?
<mallu>
I want to be able to do Time.now.strftime('%a' '%b' '%d' '%H':'%M':'%S' '%Z' '%Y') in a template but it doesn't like : between hour, minute and second
<zenspider>
it doesn't like it because it isn't valid ruby
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<mallu>
ok.. so how can I do it?
<zenspider>
mallu: why do you have many single quoted strings there?
<csmrfx>
mallu do you have ri installed?
<mallu>
zenspider it was complaining without it
<csmrfx>
$ ri Time.strftime is helpful
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<csmrfx>
>> Time.strftime("This is now %T")
<csmrfx>
>> Time.now.strftime("This is now %T")
<csmrfx>
lol typical of me
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<zenspider>
mallu: "it" == ruby. you need to learn the language to use it.
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<volty>
wasn't there and advanced regex gem ?
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<zenspider>
as you can see what volty put above, that's prolly not what you want
<volty>
an
<zenspider>
which means you need to write your string correctly... basic ruby syntax
<zenspider>
volty: prolly many. what do you need?
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<csmrfx>
my irb returns => "This is now 02:08:10"
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<volty>
zenspider: https://eval.in/206920, done but I wonder if there is some stuff with which I can write (almost) one-liners. etc etc
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<zenspider>
volty: key = cont[/^Keys=(.*)$/, 1]
<benzrf>
^K
<volty>
that one I forgot
<volty>
yap
<zenspider>
y = keys.split(...).map { |k| [k, url] }
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<zenspider>
also: for the love of god... no tabs. use 2 spaces per indent
<ghostmoth>
haha
<volty>
cat & paste prob.; thx
<dhardison>
i'm totally new to ruby and i need to write some test cases for this function: http://pastebin.com/3HKhVRGT what's the quickest way for me to get started?
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<csmrfx>
dhardison: read a ruby book?
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<dhardison>
csmrfx: that's a good idea but i need to get it done in a few hours
<zenspider>
dhardison: assuming you can ferret out what inject and reject mean, you should be able to write test cases on paper immediately
<volty>
zenspider: thx, but you cannot apply merge to an enumerator. Anyway the idea is right
<dhardison>
i think i got that part down - i read up on that, but the test case stuff i'm reading about loading up what sounds to me a lot of libraries to do it
<zenspider>
that's horribly written code, btw
<dhardison>
lol
<zenspider>
if that is homework, I'd question where it is coming from
<volty>
eh?
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<zenspider>
volty: wasn't sure what y was in this ... oh, now I see it. :P
<zenspider>
you can do << tho ?
<volty>
i am expert for rudeful teachers :)
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<volty>
yes, same as yield
<zenspider>
dhardison: loading up what exactly?
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<dhardison>
i downloaded rubymine and there's just a lot of folders and what not
<dhardison>
and i'm questioning how much of that i actually need.
<zenspider>
none of it
<zenspider>
obviously. most of us don't use rubymine
<zenspider>
if you have ruby installed, that's all you need
<zenspider>
any text editor will work. terminal to run.
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<dhardison>
csmrfx: thanks for the video - im watching it now btw
<csmrfx>
I would install irb and ri
<csmrfx>
code examples past 8 minutes
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<csmrfx>
(irb so you can test whatever, and ri to show docs)
<volty>
irb, ri, a nice quickref, and, above all, a nice book
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<volty>
so, is there something advanced that can slurp into arrays ^Keys=(.*)$ and ^Query=(.*)$? (I am just curious what is out there, in the world of the gems).
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<csmrfx>
whats "slurp"
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<zenspider>
volty: I've given you everything you need to do that in one line
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<zenspider>
text[/regexp/, 1].split(/,/)
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<volty>
zenspider: I said at the beginning that I do not have problems -- that I am just curious
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<volty>
I already modified my code (and thanked you)
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<csmrfx>
ri slurp
<csmrfx>
Nothing known about .slurp
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<volty>
i do not talk to strict context ppl, sorry csmrfx :)
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<zenspider>
volty: so I'd add a method parse_keys(text, regexp) to wrap it up and make it obvious what it is for
<volty>
no no, i found it how, working on it (for fun, since tired and lazy)
<thisguy123>
is there a rails channel?
<volty>
cont.scan /^(Keys|Query)=(.*)$/
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<apeiros_>
thisguy123: no. #rubyonrails is the rails channel. aka #ror and #rails
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<apeiros_>
pong banisterfiend. sorry, was (and still am) cleaning my home office room :-S
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<thisguy123>
i get sent to ##namespace when i try to join #rubyonrails
<thisguy123>
sry, kind of an IRC noob
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<zenspider>
volty: that's not going to give you what you want...
<apeiros>
thisguy123: you need to have your nick registered to join #ror
<apeiros>
thisguy123: /msg nickserv help register
<thisguy123>
thnx
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<thisguy123>
still can't get in to #ror, I'm registered
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<volty>
zenspider: i'm fine, cont.scan(/^(Keys|Query)=(.*)$/).to_h, and will see after how to handle multiple keys
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<csmrfx>
maybe try with ##
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<volty>
(i'm going to collect them)
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<apeiros>
thisguy123: registered and authenticated?
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<thisguy123>
yep, it says I'm logged in
<apeiros>
hm, then you should be able to join
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<volty>
i can't remember if there, and how if there: e.reduce(...) i receive { |accum, obj|, obj is a pair (an array), i want { |accum, k, v| but do not remember the syntax (if there at all)
<thisguy123>
It looks like im joining #ror then getting kicked back to a NickServ window? does that help at all?
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<ramfjord>
volty: I'm pretty sure there's no such method, but its only a little line to do
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<zenspider>
volty: { |acc, (k, v)| ... }
<volty>
ramfjord: thx, I remember there was talking about the syntax on how to do it directly in the params list, but maybe it was dropped, or my memory spoiled