Array.prototype.getLevel

[Sunny Fu]

Array.prototype.getLevel = function () {
    let max = 1
    for (const a of this) {
        if (a instanceof Array) {
            const depth = a.getLevel() + 1
            if (max < depth) max = depth
        }
    }
    return max
};
const a1 = [1, 2, [1], [1, [2, [3]]]];
console.log(a1.getLevel()); //4

[kangkang123269]

Array.prototype.getLevel = function(level, currentLevel) {
  currentLevel = currentLevel || 0;
  var count = 0;
  for (var i = 0; i < this.length; i++) {
    if (Array.isArray(this[i])) {
      count += this[i].getLevel(level, currentLevel + 1);
    }
    if (currentLevel === level - 1) {
      count += 1;
    }
  }
  return count;
};