nth

Arr::nth(array $array, int $A = 1, int $B = 0): array

even(array $array) -> nth($array, 2)
odd(array $array)  -> nth($array, 2, 1)

$array = [
    'a' => 0, 
    'b' => 1, 
    'c' => 2, 
    'd' => 3, 
    'e' => 4,
];
​
Arr::nth($array, 2, 3) ->
[
    'c' => 2,
    'e' => 4,
]
​
Arr::nth($array, 2) === Arr::even($array) ->
[
    'a' => 0, 
    'c' => 2, 
    'e' => 4,
]
​
Arr::nth($array, 2, 1) === Arr::odd($array) ->
[
    'b' => 1, 
    'd' => 3,
]