Howdy akamboj84,

In the replacement part of your regex, $dic{$matchkey} will always be undefined. $matchkey is the variable you defined above by joining all the keys in %dic, and is therefore not itself a key of %dic. What you actually meant was: 
$line =~ s%$matchkey%$dic{$&}%g;    # Use the matched string as a key 
+in $dic
$line =~ s%($matchkey)%$dic{$1}%g;  # Same as above without the perfor
+mance issues of $&

[download]
See the relevant section of perlvar.

In reply to Re: Multiline Regex replacement in Multiline file by Grimy
in thread Multiline Regex replacement in Multiline file by akamboj84

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