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Home: Perl Programming Help: Intermediate:
match part of a string in values of a hash

ssampath123
Novice

Nov 8, 2011, 11:56 AM

Post #1 of 3 (567 views)

match part of a string in values of a hash	Can't Post

Hi Im stumped...:S.

I am trying to check if part of a certain string is located as a value in a hash.

this is an example of what I am doing right now.

Code

$val = "football"; 
 
if (grep {  $_ eq /^.*$val.*/ }  values %f1H ) { 
                  print "Found\n"; 
               }

I cannot rely on the hash key as I would like to explicitly search through the values of the hash. Also, note that since I only want to check if part of the string is located, I am using regex.

Say, one of the f1H hash values is:

Code

 
$f1H{10}="I like football very much";

Then the if statment should be true.

This does not seem work :S. Plz help!

wickedxter
User

Nov 8, 2011, 12:46 PM

Post #2 of 3 (564 views)

Re: [ssampath123] match part of a string in values of a hash [In reply to]	Can't Post

Code

 
grep { print "Found " if $_ =~ /$val/ }  values %f1H };

try that....

BillKSmith
Veteran

Nov 8, 2011, 7:15 PM

Post #3 of 3 (535 views)

Re: [ssampath123] match part of a string in values of a hash [In reply to]	Can't Post

It appears that you want "Found" printed only once even if a match occurs in several values.

Code

 use strict;  
use warnings;  
use List::MoreUtils qw( any );  
my %f1H = (  
    key1 => 'I love basketball',  
    key2 => 'I love baseball',  
    key3 => 'I love football very much',  
    key4 => 'I watch Monday night footbal every week',  
);   
  
my $val = qr /football/;  
if (any {$val} values %f1H) {  
    print "Found\n" ;  
}

You can replace 'any' with 'scalar grep' if you do not want to use the module. I prefer 'any' because it documents your intention.

I see that you are using an integer (10) as a hash key. If all your keys are small integers, you probably should be using an array rather than a hash.
Good Luck,
Bill

(This post was edited by BillKSmith on Nov 8, 2011, 7:20 PM)

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