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Permutations: Difference between revisions
→{{header|Perl 6}}: use built-in
(Liberty BASIC added) |
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=={{header|Perl 6}}==
{{works with|rakudo|
First, you can just use the built-in method on any list type.
<lang Perl6>
{{out}}
<pre>a b c
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c b a</pre>
Here is
<lang perl6>sub next_perm ( @a is copy ) {
my $j = @a.end - 1;
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c b a
</pre>
Here is
<lang perl6>sub permute(@items) {
my @seq := 1..+@items;
gather for (^[*] @seq) -> $n is copy {
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}
}
.say for permute( 'a'..'c' )</lang>
{{out}}
<pre>a b c
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c b a
</pre>
Finally, if you just want zero-based numbers, you can call the built-in function:
<lang perl6>.say for permutations(3);</lang>
{{out}}
<pre>0 1 2
0 2 1
1 0 2
1 2 0
2 0 1
2 1 0</pre>
=={{header|PicoLisp}}==
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