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crystal-lang/crystal

The Crystal programming language | http://crystal-lang.org | Fund Crystal's development: http://is.gd/X7PRtI | Docs: http://crystal-lang.org/docs/ | API: http://crystal-lang.org/api/

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May 17 20:20

Blacksmoke16 synchronize #12044
May 17 18:19

straight-shoota edited #11947
May 17 18:19

straight-shoota milestoned #11947
May 17 18:18

straight-shoota closed #11971
May 17 18:18

straight-shoota closed #11970
May 17 17:21

HertzDevil labeled #12063
May 17 17:21

HertzDevil labeled #12063
May 17 17:21

HertzDevil labeled #12063
May 17 17:21

HertzDevil opened #12063
May 17 16:29

HertzDevil labeled #12062
May 17 13:50

hugopl opened #12062
May 17 13:50

hugopl labeled #12062
May 16 19:05

lbguilherme synchronize #11947
May 16 17:29

straight-shoota milestoned #11971
May 16 17:15

straight-shoota closed #12038
May 16 17:15

straight-shoota closed #12036
May 16 17:14

straight-shoota edited #12038
May 16 13:47

straight-shoota closed #12051
May 16 13:47

straight-shoota closed #12050
May 16 12:17

beta-ziliani edited #7318

George Dietrich

@Blacksmoke16

Layout.new*

or whatever the type is

nanobowers

@nanobowers

Yeah, probably so... I've used rspec for some time and never seen even half of the stuff i've seen used in this code.

George Dietrich

@Blacksmoke16

Spec module is deff a lot more simplistic than rspec, IMO for the better most of the time

nanobowers

@nanobowers

Are 'named' globals available? Saw very little discussion in the documentation and the compiler complains when the long-name versions of builtin globals are used e.g. $0 vs $PROGRAM_NAME and $? vs $CHILD_STATUS

George Dietrich

@Blacksmoke16

crystal doesn't have global vars

at least that the user can define on their own. The only real global vars are defined via the compiler, which are like $~ and $1, $n representing regex matches

nanobowers

@nanobowers

Makes sense, will need to add that to my list of things to find the Ruby equivalent for - I think i've figured out $? equiv vias Process.run()

Thanks for all of the help/advice

YusufCakan

@YusufCakan

how to people normally debug the crystal compiler. Are there any instructions on how to do this.

Jonathan Silverman

@mixflame

confirmed amber redis websocket adapter patch is stable and works with multiple amber processes :D

+tests added+

From IRC (bridge bot)

@FromIRC

<postmodern> is there an Enumerable method that finds the last occurance based on a block?

<jhass[m]> mmh, I don't think so but could maybe concort something with with_index and max?

Quinton Miller

@HertzDevil

you cannot traverse backwards with an Enumerable, but there's rindex for Indexable

From IRC (bridge bot)

@FromIRC

<jhass[m]> https://carc.in/#/r/bhf3

<jhass[m]> has some yet unhandled edge cases around the only match being the first one or no match of course

Quinton Miller

@HertzDevil

https://carc.in/#/r/bhfb

From IRC (bridge bot)

@FromIRC

<jhass[m]> Indexable#rfind could use reverse_each and break I guess

From IRC (bridge bot)

@FromIRC

<postmodern> how do i specify a literal ASCII string? "\xff\xfe" is being interpreted as a unicode string with one character instead of two

Ali Naqvi

@naqvis

"\u{ff}\u{fe}" if two separate chars

https://carc.in/#/r/bhhm

From IRC (bridge bot)

@FromIRC

<postmodern> ah, weird syntax but that seems to work

<postmodern> ah but that defines a unicode string of four bytes. i need a two-byte string of 0xff and 0xfe

Ali Naqvi

@naqvis

"\xff\xfe" is actually two byte String

pp "\xff\xfe".to_slice # => Bytes[255, 254]

can you please describe, what are you getting? and what's your expected output?

From IRC (bridge bot)

@FromIRC

<postmodern> i think the problem is because my code is using String#chars which returns unicode characters

Ali Naqvi

@naqvis

but FF FE is a UTF16-LE BOM

From IRC (bridge bot)

@FromIRC

<postmodern> yeah, kind of wish Crystal had a way to forcibly defining an ASCII string, so you can contain non-UTF binary strings of random data that could be misinterpreted as UTF codepoints

Ali Naqvi

@naqvis

pp "\u{ff}\u{fe}".chars # => ['ÿ', 'þ']

this is correct representation

From IRC (bridge bot)

@FromIRC

<postmodern> bytes shows extra unicode stuff in there [195, 191, 195, 190]

George Dietrich

@Blacksmoke16

are they multibyte chars?

From IRC (bridge bot)

@FromIRC

<postmodern> they shouldn't be, but i guess they are being interpreted as such

Ali Naqvi

@naqvis

since String is UTF-8 but you are dealing with UTF-16

so you should be invoking "\u{ff}\u{fe}".to_utf16 to get the correct byte representation

From IRC (bridge bot)

@FromIRC

<postmodern> crystal's utf8-by-default Strings are making it hard for me to define a String of garbage ASCII data

George Dietrich

@Blacksmoke16

https://crystal-lang.org/api/master/String.html#non-utf-8-valid-strings

Ali Naqvi

@naqvis

for encoding other than UTF-8 you should be using stream instead of String

From IRC (bridge bot)

@FromIRC

<postmodern> ah ha, thanks

From IRC (bridge bot)

@FromIRC

<postmodern> curious why String.new(Bytes[0xff, 0xfe]).chars.map(&.ord) returns [65533, 65533]

<postmodern> ah ha, i probably want to check String#valid_encoding? and check String#chars otherwise check String#bytes.

Ali Naqvi

@naqvis

its because that's not valid UTF-8

String.from_utf16("\u{ff}\u{fe}".to_utf16).chars.map(&.ord) # => [255, 254]

From IRC (bridge bot)

@FromIRC

<postmodern> well got specs passing. good enough for now.

<jhass[m]> I still wish we kept String at enforced valid UTF-8 only and instead developed better tooling around Bytes

From IRC (bridge bot)

@FromIRC

<jhass[m]> the dual use of String as character and byte array is a C ism that has no real place in a high level language IMO. It's probably my biggest gripe with Ruby

From IRC (bridge bot)

@FromIRC

<postmodern> as long as you don't end up going the route of python3's byte arrays vs utf8 strings. that seems to be creating a lot of friction.

<postmodern> i'd be happy if String#valid_encoding? # => false, then the String would fallback to raw ASCII where #chars would be the ASCII bytes converted to ASCII 8bit chars.

<postmodern> seems a bit magic with how String tries its best to convert non-UTF byte sequences to UTF chars. idk, i need to sleep.

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