in reply to Re: self-feeding infinite loop
in thread self-feeding infinite loop

on the contrary,the code i first posted , namely the first example is showing that using foreach and push works to achieve an infinite loop behaviour.

Replies are listed 'Best First'.
Re^3: self-feeding infinite loop
by bart (Canon) on Aug 18, 2007 at 14:17 UTC
    Maybe it works, maybe it doesn't. But you're definitely in the territory of "unpredictable behaviour".
[reply]
      But you're definitely in the territory of "unpredictable behaviour"

      I may be being somewhat picky (or I may even be downright wrong), but I don't see any "unpredictable behaviour" there. I agree that one needs to be careful when modifying an array by iterating over the same array, but the following does behave predictably: 
      use strict;
use warnings;
my @array = ('a');
foreach (@array) {
    push @array,'a';
    print"@array\n";
    sleep(1); # so we can absorb what's happening
}

      [download]
      Cheers,
      Rob
[reply]
[d/l]
        It's not "unpredictable" in the sense of being random but it is undefined in the sense that it is not specified in the documentation and could potentially change in a future release. Quoting perlsyn:
        If any part of LIST is an array, foreach will get very confused if you add or remove elements within the loop body, for example with splice. So don't do that.
        I should add for the record that I once asked the same question myself.
[reply]

In Section Seekers of Perl Wisdom