use Perl

• Block/Proc (Score:1)

  by chromatic (983)

  I don't have time to experiment myself, but is this the difference between a Block and a Proc again?
  • Re: (Score:1)

    by erikh (9175)

    It's more-or-less the equivalent of: map { return; } @array The inline block returns to the previous position in the call stack, which is not the method the map was placed in, but the method above that.
  • Re: (Score:1)

    by jjore (6662)

    Oops, yes. So I just learned that blocks aren't functions even though they syntactically look like them. Apparently this would have worked just fine if I'd passed a proc{} in and use .call on it instead.

    I'm not sure why Rubyists accept blocks the way they are.

    Heck, why do perlers except that map and grep's little lambdas don't treat return() properly?
• The Reason Why (I Think) (Score:1)

  by frew (9054)

  With perl, a coderef is a subroutine, basically.  With rubies coderefs, they are more like perl's blocks:
  
  use feature ':5.10';
  sub foo {
     say 'beginning of foo';
     bar();
     say 'ending of foo';
  }
  
  sub bar {
     say 'beginning of bar';
     my @foo = grep { return } (1,2,3,4); # I'd say this should mean none
     say 'ending of bar';
  }
  
  foo();
  
  Note that the grep kills bar.

  --
  --fREW
  http://blog.afoolishmanifesto.com