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<StoneCypher>
when i net::http something i would expect to work, and that does work from my js impl, the ruby impl says that the remote side just closed the connection
<StoneCypher>
i'm pulling a post demo almost verbatim from a manual
<StoneCypher>
is there a way to find out whether the far server gave response headers? alternately, is there an obvious thing a ruby noob might be doing wrong?
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<Suresh>
hi guys i'm stuck at this particular exercise 40 on extra credit, apparently i declared $cities as global variable, but i still getting undefined method cities
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<IsoLinCHiP>
Is there a common way to instruct bundler to install a specific locally built gem file? I had to modify an ancient gem to work for me and dont want bundler to install the rubygems version but my locally generated one.
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<apeiros>
IsoLinCHiP: path: and git:, check the bundler docs for those
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<bb57>
salve
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<bb57>
!list
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<bb57>
ita?
<bb57>
byby
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<finnnnnnnnnnn>
Hi eveyone. I’m using kramdown to convert some markdown to latex - anyone know how I then save as a pdf?
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<jxf>
@finnnnnnnnnnn the snippet looks like it's just going to save the *.md file, convert to LaTeX, and then save the LaTeX source to a file named "outputfile.pdf"
<jxf>
i.e., it's a file that looks like a PDF based on its name, but just contains LaTeX source
<jxf>
you need an intermediate step or library that will take the LaTeX source and render it to PDF
<ruby[bot]>
al2o3-cr: # => /tmp/execpad-b5bd5ddacb57/source-b5bd5ddacb57:2: Use RbConfig instead of obsolete and deprecated Con ...check link for more (https://eval.in/702944)
<t-richards>
alwyn: Which gem are you trying to install? Did you write the gem?
<t-richards>
?context alwyn
<ruby[bot]>
alwyn: Please add more context to your question, what are you doing, why are you doing it, which libraries are involved. Post some code to gist if it clarifies your question.
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<marchelzo>
my ruby version is 2.4.0dev
<marchelzo>
does that mean i have a development build?
<marchelzo>
like with debugging information and no optimizations?
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<t-richards>
marchelzo: "2.4.0dev" means you're running the in-development version of the Ruby interpreter, but it does not tell you whether you have debug symbols or compiler optimizations
<t-richards>
You can figure that out by checking your configure_args:
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<t-richards>
>>require 'rbconfig'; p RbConfig::CONFIG["configure_args"]
<ruby[bot]>
t-richards: # => " '--prefix=/execpad/interpreters/ruby-2.3.0' '--disable-install-doc'" ...check link for more (https://eval.in/702952)
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<marchelzo>
:/
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<marchelzo>
which arbitrary precision library does ruby use if you build without gmp?
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<jeffreylevesque>
do you declare $variables, or variables?
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<marchelzo>
how do you mean
<t-richards>
marchelzo: Looks like GMP is used for acceleration of arbitrary precision stuff; if you don't have it then Ruby falls back to its own internal implementation https://bugs.ruby-lang.org/issues/8796
<marchelzo>
dang
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<marchelzo>
i wonder why the homebrew formula has such whacky defaults
<marchelzo>
maybe i should just build it myself from source
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<apeiros>
jeffreylevesque: there's no separate declaration syntax in ruby. first assignment "declares" variables.
<apeiros>
jeffreylevesque: but yes, you should assign before using. $globals and @ivars autovivify to nil, but will trigger a warning if not assigned prior to first use
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<alwyn>
t-richards: sorry for delay, it was libvirt, but it's apparently vagrant-libvirt. I've got a follow-up issue now but no time to look at it right now :)
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<alwyn>
Thanks for the response anyway, I'll be back later if I can't figure it out!
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<PaulePanter>
Hi. Is there a method for Array, that gives me the index, and the value for the block as variables?
<PaulePanter>
I only found `each` and `each_index`.
<eizua>
If only Zealdocs did not lose the ability to go to that particular section of the docs when I click on the search result
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<StoneCypher>
so, gotchas for ruby noobs on POSTs? i have a piece of javascript that does what i expect, but when i tried to reimplement it in ruby, the remote host closes the connection
<StoneCypher>
so far i can't tell the difference (it's trivially simple JS)
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<lupine>
I made use a library using it this month. it's reasonable
<lupine>
made us of*
<lupine>
oh you know what I mean
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<tau>
hi guys. i know that to_enum(:somemethod) works for functions outside classes. consider the situation i have a class Alpha with a static method foo that requires a block. how could i convert that into an enumerator?
<tau>
i have been trying to_enum(:Alpha.foo) but it doesnt work although it makes some sense.
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<SpComb>
I want some kind of self.clone.freeze -> immutable for safely sharing objects between threads :)
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<pilne>
but it is 100% counter-intuitive to what most (all?) of us were taught, and most (all?) other programming languages
<apeiros>
indeed
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<pilne>
if it is indeed called bankers rounding
<pilne>
just make float.bank
<pilne>
win
<pilne>
make it availiable, but explicitly so
<zacts>
marchelzo: sorry indeed
<marchelzo>
then people will get the idea that Float is reasonable for representing monetary values
<pilne>
hmmm then call it sumfin else
<pilne>
just don't make it default lol
<marchelzo>
in C you can manipulate the floating point environment and change the rounding mode
<apeiros>
that mistake started when they chose n.m (as in 3.12) as float literal instead of decimal :-/
<marchelzo>
meh, i'm ok with that
<marchelzo>
it's consistent with most popular languages
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<marchelzo>
although 3.12f would be fine too
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<apeiros>
I'd have used 3.12e, seamless with 3.12e5
<apeiros>
i.e. exponent defaults to 0
<marchelzo>
i guess that could work too
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<bovis>
pilne: how far does the (proposed) rounding go? (2.5).round = 2, but does (2.9).round = 2 ? Everything short of 3, beginning at .5, or just stopping at .5, up from .4?
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<apeiros>
bovis: ieee rounding is "towards even number"
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<apeiros>
that is, only as a tie-break.
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<apeiros>
closest even number to 2.5 is 2. closest even number to 3.5 is 4.
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<bovis>
feels awkward
<apeiros>
sure, to me too
<apeiros>
but I guess the rounding system we're used to would feel awkward to somebody used to "round to even"
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<SeepingN>
that's retarded. excuse my American.
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<marchelzo>
maybe they should just add Float.set_rounding_mode
<marchelzo>
with some constants like Float.IEEE_754
<apeiros>
SeepingN: have you read the argument in favor of "round to even", or against "round away from zero" ("our" mode)?
<pilne>
it was using round(even) as the default method for tie-breaking
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<pilne>
with .5 being the tie number
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<bovis>
apeiros: agreed that it's a matter of what I'm used to, though it also seems like never being able to round to an odd number would get in the way of some operations or add the need for a separate method like .roundodd... all the bases are covered with the current style of rounding down at .4 and up at .5
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<marchelzo>
of course you could round to odd numbers
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<marchelzo>
(3.4).round would still be 3
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<SeepingN>
0 1 2 3 4 | 5 6 7 8 9
<apeiros>
bovis: due to history I think the (apparently) chosen way is correct. stick to the existing method as default, provide the other ways to round via parametrization
<Eiam>
I've never heard of round to even
<Eiam>
that seems very weird
<SeepingN>
.5 rounds up. to whatever
<marchelzo>
SeepingN: lol
<apeiros>
SeepingN: 0 is wrong in that enumeration
<Eiam>
yea exactly, rounding up is always .5 goes to next whole number
<marchelzo>
that's like those troll proofs that 0.999... != 1
<SeepingN>
oh. 1 2 3 4 5 | 6 7 8 9 0 ?
<pilne>
in "nearest even" 3.5 will round to 4, as will 4.5
<apeiros>
Eiam: no, it goes away from zero to the next whole number
<Eiam>
or did american teach me wrong, like the standard system vs metric?
<apeiros>
SeepingN: nowhere. 0 is where it rounds to. it's the "neutral" element which doesn't get rounded
<marchelzo>
SeepingN: you wouldn't count 0 unless you also count numbers arbitrarily close to x.999...
<apeiros>
so you can't put it on one of the sides.
<marchelzo>
you can't balance it
<SeepingN>
so 5.0 rounds to 5. it's still a valid digit
<Eiam>
1 is odd
<Eiam>
but 0 is the closest even
<marchelzo>
partitioning a set of integers is not the way to reason about real numbers
<apeiros>
that too :)
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<SpComb>
and reasoning about real numbers is not the way to reason about floating point either :P
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<Eiam>
wish I hadn't clicked this tab
<marchelzo>
well we'd like floating point to come as close as possible to real numbers
<Eiam>
now I'm all worked up about rounding. sigh
<apeiros>
SpComb: given that this part is about floats trying to approximate real numbers, I think it is
<apeiros>
heh
<pilne>
my feeling is one should make as many of the options possible, that are possible, but default to one that goes along with how worldwide education tends to teach.
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<apeiros>
Eiam: you can relax. if you don't do something, everything will stay as it is
<Eiam>
pilne: adding options has its own support cost
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<apeiros>
but if you want, you have additional options as of 2.4
<marchelzo>
SeepingN: consider that there is nothing special about decimal. if you want count 0 as a "valid digit", then look at base-3. 0 1 | 2
<pilne>
maybe not in core, but in a lib or gem
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<marchelzo>
s/want/want to/
<pilne>
besides, ruby seems to not mind support cost in favor of programmer ease, so imho it is a bit of a non-issue?
<ycyclist>
I've got an old version of minitest, and it's hitting a situation where the same constant containing require file is colliding from one test to another. There must be a standard handling for this. I do have 1.9.1 minitest though.