Not quite.
do_something_with( $item );
will always be the same as
do_something_with( undef );
in your code. foreach restores the initial value when the loops exits (in effect), as seen in the following snippet:
use strict;
my @values = (1, 2, 3, 'a', 4);
my $item = 'z';
foreach $item (@values) {
last if $item =~ /[^\d]/;
}
print($item); # Prints 'z', not 'a'.
I thought it might be using a localized global when my is omitted, but it's clearly not the case:
use strict;
sub test {
our $item;
print("[$item]");
}
{
my @values = (1, 2, 3, 'a', 4);
my $item = 'z';
foreach $item (@values) {
test();
last if $item =~ /[^\d]/;
}
print($item);
}
# Outputs "[][][][]z"
# Changing "my $item" to "our $item"
# changes the output to "[1][2][3][a]z"
This is perl, v5.6.1 built for MSWin32-x86-multi-thread
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|