Re: Why does 'keys' need a named hash?


There's more than one way to do things
	PerlMonks

by duelafn (Parson)

on Apr 05, 2017 at 12:04 UTC ( #1187096=note: print w/replies, xml )

Need Help??

It needs a real hash to work on (possibly there is a more technical description of this), but the map just produces a list of values, not a hash.

You can do it all in one line though:

use 5.010;
sub uniq {
    return keys %{ {map { $_ => 1 } @_} };
}

say for uniq qw/ foo bar foo baz bip foo /;
[download]

Good Day,
Dean

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