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rand: move the shuffle function from arrays to rand.util (#8587)

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This commit is contained in:
Subhomoy Haldar
2021-02-05 23:54:38 +05:30
committed by GitHub
parent ed6fc79fbe
commit 9a1da1a97b
4 changed files with 48 additions and 45 deletions
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25
vlib/arrays/arrays_test.v
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@ -44,31 +44,6 @@ fn test_idx_max() {
assert idx_max<byte>(c) == 1
}
fn test_shuffle() {
rand.seed([u32(1), 2]) // set seed to produce same results in order
a := [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
mut b := a.clone()
mut c := a.clone()
shuffle<int>(mut b, 0)
shuffle<int>(mut c, 0)
assert b == [6, 4, 5, 1, 9, 2, 10, 3, 8, 7]
assert c == [1, 6, 5, 8, 7, 2, 10, 9, 3, 4]
// test shuffling a slice
mut d := a.clone()
shuffle<int>(mut d[..5], 0)
assert d == [5, 2, 1, 3, 4, 6, 7, 8, 9, 10]
assert d[5..] == a[5..]
// test shuffling n items
mut e := a.clone()
shuffle<int>(mut e, 5)
assert e[..5] == [10, 3, 1, 8, 4]
assert e[5..] == [6, 7, 5, 9, 2]
// test shuffling empty array
mut f := a[..0]
shuffle<int>(mut f, 0)
assert f == []int{}
}
fn test_merge() {
a := [1, 3, 5, 5, 7]
b := [2, 4, 4, 5, 6, 8]