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Ingy döt Net 2013-10-27 22:24:23 +00:00
parent 6f050a029e
commit 776bba907c
3887 changed files with 59894 additions and 7280 deletions
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16
Task/Permutations/D/permutations-1.d
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@ -1,11 +1,9 @@
import std.stdio: writeln;
T[][] permutations(T)(T[] items) {
T[][] permutations(T)(T[] items) pure nothrow {
T[][] result;
void perms(T[] s, T[] prefix=[]) {
void perms(T[] s, T[] prefix=[]) nothrow {
if (s.length)
foreach (i, c; s)
foreach (immutable i, immutable c; s)
perms(s[0 .. i] ~ s[i+1 .. $], prefix ~ c);
else
result ~= prefix;
@ -15,7 +13,9 @@ T[][] permutations(T)(T[] items) {
return result;
}
void main() {
foreach (p; permutations([1, 2, 3]))
writeln(p);
version (permutations1_main) {
void main() {
import std.stdio;
writefln("%(%s\n%)", [1, 2, 3].permutations);
}
}