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Documented shuffle from random module (#5204)

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Benjamin Summerton 2017-01-11 00:05:41 -05:00 • committed by Andreas Rumpf
commit 17c62bb545
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lib/pure/random.nim
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@ -107,6 +107,7 @@ proc randomize*(seed: int) {.benign.} =
state.a1 = ui(seed and 0xffff) state.a1 = ui(seed and 0xffff)
proc shuffle*[T](x: var seq[T]) = proc shuffle*[T](x: var seq[T]) =
## Will randomly swap the positions of elements in a sequence.
for i in countdown(x.high, 0): for i in countdown(x.high, 0):
let j = random(i + 1) let j = random(i + 1)
swap(x[i], x[j]) swap(x[i], x[j])