GrandFather,
Update: just to make it a little clearer - Perl generates the list for the foreach "up front" before the first iteration of the loop.

Unfortunately, the story is about as clear as mud. In recent Perl's, there are optimizations to avoid generating the entire list up front when and where possible. For instance: 

for (1 .. 2_000_000_000) {
    print "$_\n";
}

[download]
You will see by checking memory consumption that the list is not generated.

Cheers - L~R

In reply to Re^2: foreach to for by Limbic~Region
in thread foreach to for by tricolaire

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