JS克隆，屬性，數(shù)組，對(duì)象，函數(shù)實(shí)例分析

更新時(shí)間：2016年11月26日 11:37:52 作者：牛逼的霍嘯林

這篇文章主要介紹了JS克隆，屬性，數(shù)組，對(duì)象，函數(shù),結(jié)合實(shí)例形式分析了javascript中面向?qū)ο蟪绦蛟O(shè)計(jì)相關(guān)的對(duì)象、屬性、函數(shù)及數(shù)組等相關(guān)技巧,需要的朋友可以參考下

本文實(shí)例講述了JS克隆，屬性，數(shù)組，對(duì)象，函數(shù)。分享給大家供大家參考，具體如下：

<script type="text/javascript">
/* 克隆原型得到對(duì)象 */
function clone(object) {
  function F() {}
  F.prototype = object;
  return new F;
}
var Person = {
 name: 'default name',
 getName: function() {
  return this.name;
 }
};
var reader = clone(Person);
console.log(reader.getName()); // This will output 'default name'.
reader.name = 'John Smith';
console.log(reader.getName()); // This will now output 'John Smith'.
/* Author Prototype Object. */
var Author = clone(Person);
Author.books = []; // 書(shū)數(shù)組
Author.getBooks = function() {
 return this.books;
}
var author = [];
author[0] = clone(Author);
author[0].name = 'Dustin Diaz';
author[0].books = ['JavaScript Design Patterns'];
author[1] = clone(Author);
author[1].name = 'Ross Harmes';
author[1].books = ['JavaScript Design Patterns','PHP','Mysql'];
console.log(author[0].getName());
console.log(author[0].getBooks());
console.log(author[1].getName());
console.log(author[1].getBooks());
</script>

結(jié)果

這里的console.log很有意思，比alert有意思，alert不能獲取全部數(shù)據(jù)，需要一個(gè)個(gè)彈出。

js的數(shù)組定義也很有意思。

進(jìn)一步升級(jí)

<script type="text/javascript">
/* 克隆原型得到對(duì)象 */
function clone(object) {
  function F() {}
  F.prototype = object;
  return new F;
}
var Person = {
 name: 'default name',
 getName: function() {
  return this.name;
 }
};
var Author = clone(Person);
Author.books = []; // 書(shū)數(shù)組
Author.getBooks = function() {
 return this.books;
}
var authorClone = clone(Author);
console.log(authorClone.name); // string 'default name'.
authorClone.name = 'new name'; // 重新賦值
console.log(authorClone.name); // Now linked to the primative authorClone.name, which
// is the string 'new name'.
console.log(Author.getName()); // 沒(méi)有改變，任然是 'default name'
console.log(Author.getBooks()); // 空的
authorClone.books.push('new book'); // Author被改了
authorClone.books.push('new new book'); // Author被改了
console.log(Author.getBooks()); // array 'new book'
console.log(authorClone.getBooks()); // array 'new book'
authorClone.books = []; // 定義了屬于自己的books數(shù)組
authorClone.books.push('new book2'); // We are now modifying that new array.
authorClone.books.push('new book3');
authorClone.books.push('new book4');
console.log(authorClone.getBooks());
console.log(Author.getBooks());
var CompoundObject = {
 string1: 'default value',
 childObject: {
  bool: true,
  num: 10
 },
 getChild: function() { // 返回對(duì)象Object
  return this.childObject;
 }
}
var compoundObjectClone = clone(CompoundObject);
compoundObjectClone.childObject.num = 5; // 不好的方式
compoundObjectClone.childObject = { // 好一點(diǎn)的方式
 bool: true,
 num: 5
};
console.log(compoundObjectClone.getChild());
</script>

結(jié)果：