04. Sorting

function sorting(arr) {
    let sortedArr = [];
    arr.sort((a,b) => a - b);

    while (arr.length !== 0) {
        sortedArr.push(arr.pop())
        sortedArr.push(arr.shift());
    }
    console.log(sortedArr.join(' '));
}

Или:

function sorting(arr) {

    arr.sort((a,b) => a - b);

    for (let i = 0; i < arr.length; i += 2){
        arr.splice(i, 0, arr.pop());
    }
    console.log(arr.join(' '));
}