each.js

function each (object ,fn ) {
  var fnLength = fn.length,
      key;
  console.log(fnLength);
  if (fnLength === 1) {
    for (key in object) {
      fn(object[key]);     
    }
  } else {
    for (key in object) {
      fn(key, object[key]);     
    }
  }
}