sl2782087 / codemon Goto Github PK

Array.prototype.flatten = function() {
	return this.reduce((a, b) => (Array.isArray(b) ? a.concat(b.flatten()) : a.concat([b])), []);
};

//[1,[2,[3]]].flatten() -> [1,2,3]

Array.prototype.flatten = function() {
	return [].concat(...this.map(a => (Array.isArray(a) ? a.flatten() : a)));
};

//[1,[2,[3]]].flatten() -> [1,2,3]

Array.prototype.onlyone = function() {
	return [new Set(...this)];
};

//[1,2,3,1].onlyone() -> [1,2,3]

function add(x) {
  let sum = x;
  const fn = function(y) {
    sum = sum + y;
    return fn
  }
  fn.toString = function() {
    return sum
  }
  return fn
}

//add(1)(2)(3) -> 6