$c = () = $a =~ /\./g

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That counts the number of the characters '.' in the $a string.

A more efficient way to do that is: 

$c = $a =~ tr/.//

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But note that while the first verion will work with strings of any length the second verion will only work with characters.

In reply to Re: Syntax Perl Version support $c = () = $a =~ /\./g by jwkrahn
in thread Syntax Perl Version support $c = () = $a =~ /\./g by h2

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