I was reviewing some old code and found this: 
foreach $key (keys %form_data) {
    my $temp1=$key;
    my $temp2=$form_data{$key};
    $temp1=~s/([^A-Za-z0-9])/sprintf("%%%02X", ord($1))/seg;
    $temp2=~s/([^A-Za-z0-9])/sprintf("%%%02X", ord($1))/seg;
    $form_data.=$temp1.'='.$temp2.'&';
}
$form_data=~s/\&$//;

[download]
I thought it might be better written as a map, so I came up with this: 
$form_data = join('&', map {
                            s/([^A-Za-z0-9])/sprintf("%%%02X", ord($1)
+)/seg;
                            $form_data{$_} =~ s/([^A-Za-z0-9])/sprintf
+("%%%02X", ord($1))/seg;
                            "$_=$form_data{$_}";
                            } sort keys %form_data);

[download]

The map function works as designed and with no complaints, but I was surprised that I could get away with using multiple semi-colon-terminated expressions in it. Is this surprising to anyone else, or just me?

In reply to map { ; ; ; } @array by kwaping

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