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* Remove the need for variables $zeros and $nulls for processing opt-hash before calling getopts() * opt-e is guarded against undef by length() check * opt-p and opt-P are used in a print() statement so init these to empty string directly * When overriding opt-1, opt-g and opt-c, use logical operator instead of addition operator, which would warn for undef operand * As done previously with filehandles, convert directory handle DIR to a my-variable (this is used for for grep -r)
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