function getThis() {  

  'use strict';

  return this;

}

var one = getThis.bind(1);  

// Bound function invocation

console.log(one()); // => 1  

// Use bound function with .apply() and .call()

console.log(one.call(2));  // => 1  

console.log(one.apply(2)); // => 1  

// Bind again

console.log(one.bind(2)()); // => 1  

// Call the bound function as a constructor

console.log(new one());     // => Object