Here's an in-place edit: 
   s/([^=]+)/(my $lhs=$1) =~ tr:_:.:; $lhs/e for @envArray;

[download]
Making it work on a copy is just a matter of 
   s/([^=]+)/(my $lhs=$1) =~ tr:_:.:; $lhs/e for @array=@envArray;

[download]
Caution: Contents may have been coded under pressure.

In reply to Re: substitution in a string by Roy Johnson
in thread substitution in a string by s_gaurav1091

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