in reply to using constants in regex/search

I typically use: 
my $NAME = "abc";
...
if ($input =~ /$NAME/) {
    ...
}

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It does use a variable, but it saves a sub. The advantage of being able to interpolate variables to me outweight the advantages 'constants' give me.

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Re^2: using constants in regex/search
by spmlingam (Scribe) on Dec 02, 2008 at 11:34 UTC
    You can use like this
    if ($input =~ /${\NAME}/) { print "Matched!"; }

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[d/l]
      That's identical to 
          if ($input =~ /$NAME/) {...}

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      which is what I used, so I don't get your point.
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[d/l]
        You have copied the NAME value to a variable and used as $NAME.
        i have specified a method, which will use the constant NAME itself in the regular expression
        use strict;

use constant NAME => 'abc';

if ($ARGV[0] =~ /${\NAME}/) { print "match"; };

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[d/l]
        You're thinking of ${NAME}. ${\NAME} is the scalar version of @{[ NAME ]}.
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[d/l]
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