In your example, I think you mean to use a character class, $agent =~ /[A-Z]/. Applying that to your question, you want to use the substitution operator:

$agent = 'PerlBeginnerPerl';
$agent =~ s/([A-Z])/ $1/g;

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Taking that apart, the parens store the matched character in $1. A space followed by the value of $1 is substituted. The g flag is for global, it make the substitution apply all through the string..

This will insert a leading space if the first character is capitol. To avoid that we can use a more sophisticated gadget. The additional element is a negative lookbehind assertion that we're not at the beginning of the string:

$agent =~ s/(?<!^)([A-Z])/ $1/g;

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Update: (Assuming my reading of the question was correct) The second version can be converted to capture nothing by using positive lookahead for the capitol letter:

$agent =~ s/(?<!^)(?=[A-Z])/ /g;

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This does the insertion by looking at the surroundings of the notch before a character, and inserting a space if conditions warrant.

After Compline,
Zaxo

In reply to Re: Search for a character in CAPS by Zaxo
in thread Search for a character in CAPS by c_lhee

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