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Re: Store and match

by prasadbabu (Prior)
on Aug 11, 2009 at 06:26 UTC ( #787499=note: print w/replies, xml ) Need Help??

in reply to Store and match

The mistake you have done is you have not stored the current line in variable $x. Also \w+ will match only 'note_values' and not the remaining string 'note_values,notes_values2 ' as it contains ',' in between.

The below code will meet your requirement. Also refer perlre to learn how to store the matched value in variables.

while($x=<DATA>){ if ($x =~ /^\[Note\](.+)$/){ $var = $1; #store in a variable print $var; } }


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Re^2: Store and match
by Anonymous Monk on Aug 11, 2009 at 06:37 UTC
    #!/usr/bin/perl while($x=<DATA>){ if ($x =~ /^\[Note\](.+)$/){ $var = $1; #store in a variable print $var; } } __DATA__ [Note] note_values,notes_values2 [Book] novels,magazines [Note] note_values,notes_values3
    Hi, if the values are as above, then how to print the values of Note. If the values of Note has "note_values", then how to count the number of occurence

      I am not clear with your inputs because in your previous node you gave [Note] in same line and now in two lines. Any how the below code will work for your above input. It will also match note_values if more than one present in a single line.

      use strict; use warnings; my $prev = 0; my $total = 0; while(my $x = <DATA>){ $prev = 1 if ($x =~ /^\[Note\]$/); my $count = 0; if (($x =~ /note_values/) && $prev){ $count = $x =~ s/(note_values)/$1/g; #if more than one note_va +lues present in a line $prev = 0; } $total = $total + $count; } print "Number of occurence: $total";


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