4 ms·

Also: react { whenever } # Code runs when a condition is met. I can only think this must be a generic https://en.wikipedia.org/wiki/COMEFROM https://en.wik

• cygx 11y ago
  Cf http://www.jnthn.net/papers/2015-spw-concurrency.pdf http://www.jnthn.net/papers/2015-spw-concurrency.pdf
  • raiph 11y ago
    From pages 56 and 57: > Perl 6 has an asynchronous looping construct called whenever ... runs whenever a value arrives ... can live in a ... react block (works like entering an event loop) my $code = supply { whenever IO::Notification.watch-path($src-dir) { emit .path if .path ~~ /<.pm .p6> $/; } } So now, whenever something in $src-dir changes and its path ends with '.pm' or '.p6' that path will be emitted -- which in this case means it'll be pushed to any construct pulling from $code. Such as: react { whenever $code -> $path { say "Code file $path changed!"; } }
  • btown 11y ago
    This is probably the most interesting link in this entire thread. The "react" keyword is just a channel subscription, and inside it has a pattern matcher. Channels are first-class citizens, and you're encouraged to chain channels rather than falling into callback hell. It's like Go and Ruby had a child. If anything piqued my interest in Perl 6, it was this.
• cstross 11y ago
  INTERCAL finally weeps for joy at being able to claim Perl 6 as a spiritual descendant.
  • meepmorp 11y ago
    Nice to know I'm not the only one who thought that. Now they just need the PLEASE keyword.
• _delirium 11y ago
  That construct reminds me most of callbacks: you define some code, and register it to be called in certain circumstances.