08:18 <frojnd> Hi there.

08:18 <frojnd> I'm trying to use MD5 function for a file that I just uploaded to the server

08:20 <Sankalp> Hello

08:20 <frojnd> Not sure how can I perform this with crystal lang

08:23 <Sankalp> Perhaps something like this: Digest::MD5.digest

08:25 <Sankalp> See this: https://crystal-lang.org/api/1.3.2/Digest/ClassMethods.html

08:27 <frojnd> Thank you

12:48 <FromGitter> <Blacksmoke16> frojnd: `Digest::MD5.digest &.file(file_path)`

13:35 <frojnd> @Blacksmoke16 yes, it prints in bytes e.g.: => Bytes[60, 215, 160, 219, 118, 255, 157, 202, 72, 151, 158, 36, 195, 155, 64, 140] I need hex, so Digest::MD5.hexdigest(file) prints in hex: "3cd7a0db76ff9dca48979e24c39b408c"

13:36 <frojnd> Or just: Digest::MD5.hexdigest &.file("./bla.txt")

13:36 <frojnd> What's called &. after hexdigest?

13:40 <FromGitter> <Blacksmoke16> its the same as like `Digest::MD5.hexdigest { |ctx| ctx.file "./bla.txt" }`

13:43 <frojnd> Ok

13:43 <frojnd> What's this called? Semanticlly?

13:44 <FromGitter> <Blacksmoke16> https://crystal-lang.org/reference/1.4/syntax_and_semantics/blocks_and_procs.html#short-one-parameter-syntax

13:44 <frojnd> s/Semantically/semantically

13:44 <frojnd> Ah blocks and procs

13:45 <frojnd> While I'm here, What's the meaning of `::` e.g. inside `Digest::MD5`

13:46 <frojnd> https://crystal-lang.org/api/1.3.2/Digest/MD5.html It says: Class `Digest::MD5`

13:46 <FromGitter> <Blacksmoke16> i dont think its ever explicitly called out anywhere, but its the same as ruby

13:46 <FromGitter> <Blacksmoke16> tl;dr its the namespace separator. E.g. https://crystal-lang.org/reference/1.4/syntax_and_semantics/modules.html

13:48 <frojnd> Thank you

13:59 <Sankalp> frojnd: https://crystal-lang.org/reference/1.3/syntax_and_semantics/blocks_and_procs.html#short-one-parameter-syntax

19:51 <FromGitter> <vgramkris> hi, is there any ways to check if a channel is empty w/o calling receive?

19:54 <FromGitter> <wrq> https://carc.in/#/r/d3fx ⏎ ⏎ with large enums, should crystal have a cap on trying to expand cases for exhaustive case?

19:54 <FromGitter> <wrq> It's trying to enumerate 308915776 cases here, just as an example

19:56 <FromGitter> <Blacksmoke16> @vgramkris i dont think there is. But could probably use `select` to handle the case where there is no value ready to be consumed. E.g. https://lbarasti.com/post/select_statement/#non-blocking-channel-operations

19:59 <FromGitter> <vgramkris> thanks George, let me check that