Kozz has asked for the wisdom of the Perl Monks concerning the following question: ⭐ (regular expressions)
In the example below, the results are
I found a match: "a"
I found a match: "b"
There was no match for "a+b"
Now, the problem is that the + in the third key of the hash is being interpreted as a description of the regular expression, not as a literal character.
If I have a large hash which contains these types of meta-characters in the keys, how do I escape those meta-characters to prevent them being interpreted?
#!/usr/bin/perl my %hash=( 'a', '2', 'b', '5', 'a+b', '7', ); my $string='a+b'; my $key; foreach $key (keys %hash){ if($string=~/$key/){ print "I found a match: \"$key\"\n"; }else{ print "There was no match for \"$key\"\n"; } }
Originally posted as a Categorized Question.
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