/**
 * @param {number[]} A
 * @return {number[]}
 */
var sortArrayByParityII = function(A) {
    //Declare length because argument will be mutated
    let length = A.length;
    //Declare oddsArray
    let oddsArray = [];
    //Declare evensArray
    let evensArray = [];
    //Declare count
    let count = 0;
    //Declare answerArray
    let answerArray = [];

    //Loop through array
    for (let i = 0; i < length; i += 1){
        //Conditional statement to check argument element if even or odd
        if (A[0] % 2 === 0) {
            //If even, shift argumentArray to evensArray
            evensArray.push(A.shift());
        } else {
            //else shift argumentArray to oddsArray
            oddsArray.push(A.shift());
        }
    }

    //Create while loop and execute until count equals length
    while(count !== length) {
        //Conditional statement when count modulo 2 is zero
        if (count % 2 === 0) {
            //Shift evensArray to answerArray if true and then increase count by 1
            answerArray.push(evensArray.shift());
            count += 1;
        } else {
            //Shift oddsArray to answerArray if false and then increase count by 1
            answerArray.push(oddsArray.shift());
            count += 1;
        }
    }
    //Return answerArray
    return answerArray
};

console.log(sortArrayByParityII([4, 2, 5, 7]));