var indirect = { name: 'indirect function invocation' };
function concatName(string) {
  console.log(this === indirect); // => true
  return string + this.name;
}
// Indirect invocations
concatName.call(indirect, 'Hello ');  // >> 'Hello indirect function invocation'
concatName.apply(indirect, ['Bye ']); // >> 'Bye indirect function invocation'