Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

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.

Comment on Re: Hash of Regex
Download Code
Replies are listed 'Best First'.
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?


Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://833187]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others rifling through the Monastery: (4)
As of 2016-02-12 04:55 GMT
Find Nodes?
    Voting Booth?

    How many photographs, souvenirs, artworks, trophies or other decorative objects are displayed in your home?

    Results (388 votes), past polls