Until for..of came around, `Array.prototype.map.call($nodeList, myFn)` was pretty much the way to iterate over things that were "array-like" but didn't actually

Until for..of came around, `Array.prototype.map.call($nodeList, myFn)` was pretty much the way to iterate over things that were "array-like" but didn't actually inherit from Array, so didn't have such methods.