It looks like strict and warnings won't be entirely strict
on subroutines and my.
use strict;
use warnings;
my %hash = (one => "one",
two => "two",
three => "three" );
print "$hash{one}\n";
test();
exit;
sub test {
for (keys %main::hash) {
print "$_ $main::hash{$_}\n";
}
}
This will print one.
Substituting our for my will print something more expected.
Interesting behaviour.
Update:
Try it out with arrays and a scalar.
An array will warn of a var used once.
A scalar will warn of unused var and die because of
uninialized variable.
Update++: Questions like this and the
explanations from people like
danger and
tye really
are cool. They show the inner workings of Perl and
point out the nuances.
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.