Re^2: Is there an easy way to assign guaranteed unique values to a simple array without looping through whole array?

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in reply to Re: Is there an easy way to assign guaranteed unique values to a simple array without looping through whole array?
in thread Is there an easy way to assign guaranteed unique values to a simple array without looping through whole array?

curiously, (the pure-perl version of) List::MoreUtils::uniq uses

    map { $h{$_}++ == 0 ? $_ : () } @_;
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rather than

    grep { !$h{$_}++ } @_;
[download]

i wonder, a simple preference or are there interesting micro-optimizations in the map verison?

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