js--call( )/apply()/bind()--應用

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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/call

function Product(name, price) {  this.name = name;  this.price = price;}function Food(name, price) {  Product.call(this, name, price);  this.category = ‘food‘;}function Toy(name, price) {  Product.call(this, name, price);  this.category = ‘toy‘;}var cheese = new Food(‘feta‘, 5);var fun = new Toy(‘robot‘, 40);

var animals = [  { species: ‘Lion‘, name: ‘King‘ },  { species: ‘Whale‘, name: ‘Fail‘ }];for (var i = 0; i < animals.length; i++) {  (function(i) {    this.print = function() {      console.log(‘#‘ + i + ‘ ‘ + this.species                  + ‘: ‘ + this.name);    }    this.print();  }).call(animals[i], i);}

function greet() {  var reply = [this.person, ‘Is An Awesome‘, this.role].join(‘ ‘);  console.log(reply);}var i = {  person: ‘Douglas Crockford‘, role: ‘Javascript Developer‘};greet.call(i); // Douglas Crockford Is An Awesome Javascript Developer

 

 

js--call( )/apply()/bind()--應用