You can add some debug information in your grep while testing, like this: 

grep {
       print $elements[0], '$_', "\n";
       $elements[0] eq '$_'
     }
@keys;

[download]
The issue is that simple quotes prevent interpolation (ie, perl will keep the content unmodified). A bare $_ should do the trick

In reply to Re: String comparison in an array by Eily
in thread String comparison in an array by newperlbie

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