isAscending

function inAscOrder(arr) {
  for(let i = 0; i < arr.length - 1; i++) {
    if (arr[i] > arr[i+1]) {
      return false; 
    }
  }
  return true;
}

function inAscOrder(arr) {
  return arr.every((_,i)=>i==0||arr[i]>arr[i-1]);
}

function inAscOrder(arr) {
  return arr.slice(1).every((x, i) => x >= arr[i]);
}

const inAscOrder = arr => arr.join('') === arr.sort((a, b) => a - b).join('');