in reply to Appending value to a hash value

The only problem is a typo: 

$hash{'key_one'} .= "my value 2";
#                ^^   =. is not an operator

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Re^2: Appending value to a hash value
by bart (Canon) on May 05, 2005 at 08:27 UTC
    Yes, all modify-assign operators use the operator it's based upon, on the left hand side of the "=". See Assignment Operators in perlop.
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