I ran across this is code, and while my first guess was that it shouldn't work, it works well. I am just trying to wrap my head around why is does.
use strict;
use warnings;
my $current_index = 12;
my %columns = (
'alpha' => 1,
'bravo' => 2,
'charlie' => 3,
'delta' => 4,
);
foreach my $k ( keys %columns ) {
( $current_index =~ $columns{$k} )
? print "$k matches\n"
: print "$k does not match\n";
}
Output:
bravo matches
charlie does not match
delta does not match
alpha matches
I am trying to grasp why this works, why word perl automagically interpret the scalar as a regex?
-
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.
|