I have a slightly newer verison of List::Util here (1.63 as below) and sample appears to work as intended, ie. different runs produce different results:

$ pmv List::Util
1.63
$ perl -MList::Util=sample -wE 'my @x=("a".."z"); say sample (3, @x)'
jso
$ perl -MList::Util=sample -wE 'my @x=("a".."z"); say sample (3, @x)'
ter
$ perl -MList::Util=sample -wE 'my @x=("a".."z"); say sample (3, @x)'
mgl
$ perl -MList::Util=sample -wE 'my @x=("a".."z"); say sample (3, @x)'
ago
$

[download]

There's nothing in the List::Util changelog to indicate any modification to sample so either some other fix has had an effect or something else is at play.

🦛

In reply to Re^4: Add a fixed number of unique elements to hash [sample() vs. shuffle()] by hippo
in thread Add a fixed number of unique elements to hash by Vasek

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