Loop over multiple arrays simultaneously
Solutions
Solution 1 (Click to Show/Hide)
function loopSimult(A) {
const concatArr = Array(A[0].length).fill('');
for (let i = 0; i < A[0].length; i++) {
for (let j = 0; j < A.length; j++) {
concatArr[i] += A[j][i];
}
}
return concatArr;
}