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Re: Hash of Regex

by nvivek (Vicar)
on Apr 07, 2010 at 05:13 UTC ( #833187=note: print w/ replies, xml ) Need Help??

in reply to Hash of Regex

When you want use those as regular expression pattern for substitute command,there is no need to give match(//) operator to match those pattern.Because,you want to replace get the pattern from hash key and put it in the substitute command.For this,you can try the following script.

my $test = 'The brown fox int(10) over float(200) fence.'; my %dict = ( 'brown' => 'yellow', 'int\(\d+\)' => 'int', 'float\(\d+\)' => 'float', ); for my $i (keys %dict) { $test =~ s/($i)/$dict{$i}/gi; } print $test;
For better understanding,you can print the internal structure of hash by using Dumper function. You need to escape the () parentheses,because it is used for grouping in substitute command.

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Re^2: Hash of Regex
by Anonymous Monk on Apr 07, 2010 at 18:49 UTC
    Or to state nvivek's point another way:

    /int\(\d+\)/ is not a regular expression

    It is the match operator //

    with a regular expression int\(\d+\)

    After all, you wouldn't write

    $test =~ s//int\(\d+\)//int/gi;
    would you?


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