The
for(LIST) doesn't bind early either. However,
$i is just an alias to a different value, so rather than
$i itself, the closure remembers
the alias. It's easily visible if we use an array rather than a literal list.
#!/usr/bin/perl -w
use strict;
my @t = (1,2,3);
my @d;
for my $i (@t) {
push @d, sub { print "$i\n" };
}
$_++ for @t;
&$_ for @d;
__END__
2
3
4
I hadn't thought about that, though in retrospect it's quite clear. Thanks for making me ponder this.
Makeshifts last the longest.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.