[perl #130038] Builtin variable for loop index in foreach

On Mon, 28 Nov 2016 01:21:43 -0800, kentfredric@gmail.com wrote:
> If we take a different tack and propose, instead of some arcane magic,
> that we define a new keyword,
> 
> > for_idx
> 
> That can take *two* variables:
> 
> for_idx my $key, $value ( @array ) {
>     ...
> }
> 
> Then we get the benefit of explicitness, the benefit of clarity, and
> the benefit of
> working even in evals.

You also get the benefit that *you already have this*:

  while (my($key, $value) = each @array) {
    ...
  }

I'm guessing (wildly) that when the "experimental each on scalar" deprecation advances to removal, we could consider extending each() to lists to support:

  while (my($key, $value) = each(1, 2, @many)) { ... }

Hugo

---
via perlbug:  queue: perl5 status: open
https://rt.perl.org/Ticket/Display.html?id=130038

• [perl #130038] Builtin variable for loop index in foreach by Ed Avis
• Re: [perl #130038] Builtin variable for loop index in foreach by Dave Mitchell
• Re: [perl #130038] Builtin variable for loop index in foreach by Aristotle Pagaltzis
• Re: [perl #130038] Builtin variable for loop index in foreach by Kent Fredric
• Re: [perl #130038] Builtin variable for loop index in foreach by Dave Mitchell
• Re: [perl #130038] Builtin variable for loop index in foreach by Dave Mitchell
• Re: [perl #130038] Builtin variable for loop index in foreach by Kent Fredric
• Re: [perl #130038] Builtin variable for loop index in foreach by Kent Fredric
• [perl #130038] Builtin variable for loop index in foreach by Hugo van der Sanden via RT
• Re: [perl #130038] Builtin variable for loop index in foreach by Zefram
• Re: [perl #130038] Builtin variable for loop index in foreach by Dave Mitchell
• [perl #130038] Builtin variable for loop index in foreach by Ed Avis via RT
• RE: [perl #130038] Builtin variable for loop index in foreach by Ed Avis
• Re: [perl #130038] Builtin variable for loop index in foreach by demerphq
• Re: [perl #130038] Builtin variable for loop index in foreach by Dave Mitchell
• RE: [perl #130038] Builtin variable for loop index in foreach by Ed Avis