Another alternative would be to use a lookup table. It doesn't gain you much except, perhaps, readability in this particular instance where you are just losing the leading hyphen. However, it would be more useful in tranforming text further, e.g. 'UK' => 'United Kingdom'.

use strict;
use warnings;

my ( $target, $cust, $cotime ) = @ARGV;

my %lookup = (
   q{-SMC}   => q{SMC},
   q{-FET}   => q{FET},
   q{-China} => q{China},
   q{-SBM}   => q{SBM},
   );

if ( exists $lookup{ $cust } )
{
    $cust = $lookup{ $cust };
    print qq{Customer set to $cust\n};
}
else
{
    warn qq{Customer $cust not recognized\n};
}

[download]

I hope this is of use.

Cheers,

JohnGG

In reply to Re: Useless use of string eq by johngg
in thread Useless use of string eq by Flubb

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