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Just another update

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Ingy döt Net 2015-02-20 00:35:01 -05:00
parent a25938f123
commit 00a190b0a6
6591 changed files with 94363 additions and 23227 deletions
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8
Task/Knuths-algorithm-S/D/knuths-algorithm-s-2.d
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@ -1,11 +1,5 @@
import std.stdio, std.random, std.algorithm;
double random01(ref Xorshift rng) {
immutable r = rng.front / double(rng.max);
rng.popFront;
return r;
}
struct SOfN(size_t n) {
size_t i;
int[n] sample = void;
@ -14,7 +8,7 @@ struct SOfN(size_t n) {
i++;
if (i <= n)
sample[i - 1] = item;
else if (rng.random01 < (double(n) / i))
else if (rng.uniform01 < (double(n) / i))
sample[uniform(0, n, rng)] = item;
return sample[0 .. min(i, $)];
}