I avoid long runs of concatenation. 

my $key= "$a-$b" . "_$c";
my $key= join '', $a, '-', $b, '_', $c;
# or
my $key= join '', "$a-$b", "_$c";

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- tye        

In reply to Re: *Join* with more than one EXPR by tye
in thread Join with more than one EXPR by sesemin

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