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<sargas_>
on the IO Class, what does this open mode mean?
<sargas_>
"w" Write-only, truncates existing file to zero length or creates a new file for writing.
<sargas_>
what does "...truncates existing file to zero length or creates a new file for writing." mean?
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<red_menace>
not quite understanding what you are asking - that statement pretty much means exactly what it says
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<waxjar>
sargas_: it means if the file already exists, its contents are deleted. otherwise it creates a new file
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<ruby-lang858>
Hi all
<ruby-lang858>
I am new to ruby
<ruby-lang858>
I would like to create a properties file in Ruby. Can some one help me please
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<ruby-lang858>
I would like to create a properties file in Ruby. Can some one help me please
<ljarvis>
ruby-lang858: what is your actual question?
<ruby-lang858>
Hi LJarvis
<ruby-lang858>
I am new bee to Ruby
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<ruby-lang858>
I would like to create a file which is a collection of Key and value pair kind of thing. which is same as Properties file in JAVA
<ljarvis>
ruby-lang858: you should use a proper file format if you possibly can
<ljarvis>
like yaml, for example
<ruby-lang858>
is YAML it a format ?
<ruby-lang858>
i mean just like xml ??
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<ljarvis>
ruby-lang858: it's a format, unlike xml, which is more readable, less verbose, and nice for configuration files (which it sounds like you want)
<ruby-lang858>
Thank you Jarvis
<ruby-lang858>
I got an idea
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<ruby-lang858>
thank you fro your help
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<ljarvis>
no probs
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<yorickpeterse>
morning
<yorickpeterse>
yay we have a christmas tree in the office
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<ljarvis>
my christmas tree is still in a box in the living room
<ljarvis>
might wrap some lights around the box
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<sirfilip>
morning
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<ledestin>
naming question. say, I have a task to do, and I store task names in a different table. so, in Rails, I’d have task.task_name.name, which kind of sucks.
<ledestin>
after more consideration, I’m thinking, maybe I don’t want to make a separate table from names
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<ledestin>
ljarvis: and the question is, how would you name it?
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<ljarvis>
ledestin: I don't really understand the code if I'm honest, so I can't reliably make any suggestions. Do you have any basic code to show us the problem?
<ljarvis>
ledestin: right, having TaskName with just 1 name attribute doesn't really make sense
<ledestin>
ljarvis: unless it’s in a db
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<ljarvis>
im not sure how that makes a difference
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<ledestin>
let’s say there’s a lot of repetition expected
<ljarvis>
why can't Task just have a 'name' attribute
<ljarvis>
that is a string
<ledestin>
1. takes more spac
<ledestin>
2. select distinct costs more
<ljarvis>
you're not exposing enough information for anyone to help you
<ledestin>
whether that’s something that really matters, I wonder
<ledestin>
ljarvis: what is missing?
<ledestin>
I’m just expecting some names to be used time and time again
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<ljarvis>
everything? what does this have to do with dataabses? you've just brought that up with no context, how does storing a string on a 'task' take up more space? more space in memory? in the db? how?
<ledestin>
in the db
<ljarvis>
to 'TaskName' maps to a db table?
<ljarvis>
so*
<ledestin>
yes
<ljarvis>
right, that info would have helped ;)
<ljarvis>
what dbms are you using?
<ljarvis>
um, orm
<ljarvis>
if you're using one
<ledestin>
Postgres
<ledestin>
ActiveRecord
<ljarvis>
can you show the AR models and the relationship between a Task and TaskName
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<darix>
it smells a bit like "i want to have tasks and sub tasks"
<darix>
and taskname is just a task without any actual data
<darix>
but that's just me
<ljarvis>
who knows, we basically know nothing still
<ljarvis>
ledestin: ok, and you have an instance of Task::Instance? (lol)
<ledestin>
:(
<ljarvis>
so, task.task_name.name sucks?
<ljarvis>
amirite?
<ledestin>
sure
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<ljarvis>
delegate :name, to: :task_name
<ljarvis>
task.name
<ljarvis>
done
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<ledestin>
ljarvis: well, I still have to reference it in #rename
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<ljarvis>
rename sucks, use `def name=(new_name); self.task_name = Task::Name.find_or_create_by(name: new_name)`
<ljarvis>
this is ruby after all
<ljarvis>
then now you have `name=(str)` and `name => str` methods
<ljarvis>
all is good in the world
<darix>
but this is basically task and subtask
<ledestin>
ljarvis: thanks, didn’t think about that
<ljarvis>
darix: no its not
<darix>
ok
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<ljarvis>
ledestin: overriding methods like this works quite nicely, and if you know `X=(s)` & `X()#=>s` then it's good
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<yorickpeterse>
darix: wat
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<ljarvis>
ledestin: also fwiw, I see nothing wrong with just having one `Task` model and having non-unique names, with an index
<ljarvis>
that'll save lots of JOIN and multiple queries
<ljarvis>
i don't see any reason for not having 'name' as a text type on Task, but maybe there's something behind the scenes im mising
<ljarvis>
missing*
<ledestin>
ljarvis: I guess it’d make sense to test if it makes any difference to split
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<ljarvis>
ledestin: sure, I guess i'm just a bit confused why you'd think to split it, ever. Is this to help speed up bulk renames?
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<ledestin>
ljarvis: speeding up select distinct for completion
<ljarvis>
ledestin: do you have millions of records?
<ledestin>
ljarvis: nope
<ljarvis>
ledestin: hundreds of thousands?
<ledestin>
ljarvis: hardly
<ljarvis>
you see where I'm going with this?
<ledestin>
yep
<ledestin>
it seems like a user might produce 7300 records per year
<ljarvis>
I reckon you've over optimised and it's come at the cost of readable code. But it's worth testing
<ledestin>
if I count 20 tasks per day
<ledestin>
then again, I might just purge them
<ljarvis>
you could create table in postgres using generate_series to generate 1 million records, then try and distinct select on them, and then do the same with a foreign table
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<ljarvis>
but, i reckon it's faster than you'd think, and plenty fast enough
<ledestin>
ljarvis: I’ll try that, thanks
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<ljarvis>
I use something similar to complete around 600,000 records and i just do select distinct on a column
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<yorickpeterse>
Ah yes, good old repairDatabase
<yorickpeterse>
The last time I ran that my whole cluster froze for a day
<ljarvis>
frozen clusters
<ljarvis>
now im hungry
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<nofxx__>
yorickpeterse, it 's gonne in some 2.x version , but it still needs a rebuild once in a while as deletes don't seem to clean up disk space
<yorickpeterse>
Correct, fragmentation is still present
<nofxx__>
that toku claims the fractal fixes that too... actually in the disk size part it's pretty impressive
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<yorickpeterse>
fantastic
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<yorickpeterse>
ActiveRecord converts "blob" in MySQL to "bytea" in Pg
<ljarvis>
maloik: did you book bath ruby? i forgot on the first time around
<maloik>
we did!
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<apeiros_>
yorickpeterse: isn't that what it should be?
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<yorickpeterse>
apeiros_: Not if it's being used as a replacement for "text" basically
<yorickpeterse>
nfi why this is using blob in the first place, text should've been fine in mysql
<yorickpeterse>
it's just storing some JSON crap
<apeiros_>
yorickpeterse: shouldn't it be clob in mysql then? instead of blob?
<yorickpeterse>
There's no reason for it to use blob in the first place, we're not stuffing TBs of data in this field
<apeiros_>
if you store json, you might use its native format for it
<apeiros_>
well, even pg's varchars are almost arbitrary length
<apeiros_>
not the common 256 chars/bytes
<ljarvis>
text > *
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<yorickpeterse>
apeiros_: Yeah, although we never query this field
<yorickpeterse>
it basically contains a JSON backup of some data it was related to
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<apeiros_>
yeah, it can help to be able to run manual queries against it
<apeiros_>
and I think it has no downside
<apeiros_>
but: I *think*. I have no experience there (yet).
<yorickpeterse>
"has no downside" famous last words :P
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<yorickpeterse>
oh ffs, more encoding troubles
<apeiros_>
yorickpeterse: because no other words were needed anymore? :)
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<yorickpeterse>
Ah yes, String#force_encoding
<yorickpeterse>
The one method that magically makes any encoding problems go away
<yorickpeterse>
Can't convert ASCII to UTF8? Force it!
<yorickpeterse>
Can't write proper data in the first place? Fuck it, force it!
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<apeiros_>
yorickpeterse: you are aware that all force_encoding does is change that little label which tells ruby what encoding a string has, right?
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<apeiros_>
which - if it truly works - means that the label was set to the wrong value when the string was created…
<yorickpeterse>
apeiros_: lalalalalala *sticks head in sand* lalala
<yorickpeterse>
But yeah, I know it's a hack
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<apeiros_>
yorickostrich
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<yorickpeterse>
"[1855770/1910064] [ 97.16%] [43:44] [01:16] [ 706.98/s]" so close щ(ﾟдﾟщ)
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<twe4ked>
I have a (JSON) string that throws an error if I try to parse it. If I parse the same string but interpolated "#{foo}" it works. The strings look identical to me, what else could be causing this error?
<twe4ked>
oh, probably should have mentioned I'm using rubymotion, maybe I should ask there :S
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<darix>
twe4ked: it would help if you share the json string
<twe4ked>
the string is `{"password"=>"foo", "email"=>"bar"}`
<twe4ked>
calling `dup` fixes it
<twe4ked>
now I want to know why
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<darix>
i guess you typed the manually here right? ``
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<darix>
twe4ked: your error is "unexpected token at" ?
<darix>
twe4ked: i think ... the "=>" is ruby syntax
<darix>
if you do {"password"=>"foo", "email"=>"bar"}.to_json
<pipework>
mustmodify: What are you having trouble with understanding about it?
<mustmodify>
why it exists.
<mustmodify>
I understand what it does
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<pipework>
Because someone wrote it and it was seen to be a good thing.
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<mustmodify>
pipework: following your logic, let me refine my question. In what way is it a good / useful thing?
<ljarvis>
mustmodify: it's provided for symetry, nothing else
<mustmodify>
what problem can be solved with it that can not be solved by not having it?
<ljarvis>
nothing, there's a unary minus, so there's a unary plus
<|jemc|>
mustmodify: you could monkey patch the method to do something other than what it does - I often fantasize about publishing a math-mayhem gem that monkey patches math operations for wacky troubleshooting fun
<pipework>
mustmodify: It allows you to specify positive numerics as positive.
<ljarvis>
lol
<mustmodify>
maybe it makes them feel better (more positive) about themselves?
<pipework>
I wonder what happens if you're on a 32-bit system and use the largest number + 1 without specifying the +
<ljarvis>
:/
<ljarvis>
+x returns x, always
<ljarvis>
it really is just for symmetry
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<ljarvis>
(unless some asshole monkeypatched it)
<|jemc|>
;)
<mustmodify>
If it created a local variable it could be used for ... what's it called? Reverse polish notation?
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<pipework>
I don't think so.
<mustmodify>
but would be too magical.
<mustmodify>
pipework: Ah, yeah, that's not it.
<mustmodify>
RPN is 3 4 +
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<pipework>
I think you meant prefix notation.
<ljarvis>
so, polish notation without reverse? :D
<mustmodify>
Polish notation is + 3 4 but this would be
<mustmodify>
+3
<mustmodify>
+4
<pipework>
Or PN without the R
<mustmodify>
ljarvis: or RRPN
<mustmodify>
Kindergartener notation.
<ljarvis>
:D
<pipework>
ROT26 + PN
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