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arrays: add rotate_left and rotate_right (#13388)

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playX 2022-02-07 14:20:45 +03:00 • committed by GitHub
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46
vlib/arrays/arrays_test.v
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@ -218,3 +218,49 @@ fn test_upper_bound() ? {
assert (upper_bound(b, 4) or { -1 }) == -1
assert upper_bound(c, 2) ? == 2
}
fn test_rotate_right() {
mut x := [1, 2, 3, 4, 5, 6]
rotate_right(mut x, 2)
assert x == [5, 6, 1, 2, 3, 4]
}
fn test_rotate_left() {
mut x := [1, 2, 3, 4, 5, 6]
rotate_left(mut x, 2)
assert x == [3, 4, 5, 6, 1, 2]
}
struct Abc {
x u64 = 1
y u64 = 2
z u64 = 3
}
fn test_rotate_right_struct() {
mut x := [Abc{1, 0, 1}, Abc{2, 0, 1}, Abc{3, 0, 1}, Abc{4, 0, 1},
Abc{5, 0, 1}, Abc{6, 0, 1}]
rotate_right(mut x, 2)
assert x == [Abc{5, 0, 1}, Abc{6, 0, 1}, Abc{1, 0, 1}, Abc{2, 0, 1},
Abc{3, 0, 1}, Abc{4, 0, 1}]
}
fn test_rotate_left_struct() {
mut x := [Abc{1, 0, 1}, Abc{2, 0, 1}, Abc{3, 0, 1}, Abc{4, 0, 1},
Abc{5, 0, 1}, Abc{6, 0, 1}]
rotate_left(mut x, 2)
assert x == [Abc{3, 0, 1}, Abc{4, 0, 1}, Abc{5, 0, 1}, Abc{6, 0, 1},
Abc{1, 0, 1}, Abc{2, 0, 1}]
}
fn test_rotate_right_string() {
mut x := ['x1', 'x2', 'x3', 'x4', 'x5', 'x6']
rotate_right(mut x, 2)
assert x == ['x5', 'x6', 'x1', 'x2', 'x3', 'x4']
}
fn test_rotate_left_string() {
mut x := ['x1', 'x2', 'x3', 'x4', 'x5', 'x6']
rotate_left(mut x, 2)
assert x == ['x3', 'x4', 'x5', 'x6', 'x1', 'x2']
}