905. Sort Array By Parity

Given an array A of non-negative integers, return an array consisting of all the even elements of A, followed by all the odd elements of A.

You may return any answer array that satisfies this condition.

Example 1:

Input: [3,1,2,4]
Output: [2,4,3,1]
The outputs [4,2,3,1], [2,4,1,3], and [4,2,1,3] would also be accepted.

Note:

1. 1 <= A.length <= 5000
2. 0 <= A[i] <= 5000

# @lc code=start
using LeetCode

function sort_array_by_parity!(arr::Vector{Int})
    i, j = 1, length(arr)
    while i < j
        if iseven(arr[i])
            i += 1
        else
            arr[i], arr[j] = arr[j], arr[i]
            j -= 1
        end
    end
    return arr
end
# @lc code=end

sort_array_by_parity! (generic function with 1 method)

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