Underscore.js _.snapshot() 方法
_.snapshot() 方法用于深度快照或克隆给定对象。
句法:
_.snapshot( obj );
参数:此方法需要一个对象来创建一个深度克隆。
返回值:此方法返回一个克隆对象。
注意:这在普通 JavaScript 中不起作用,因为它需要安装 underscore.js contrib 库。
Underscore.js contrib 库可以使用npm install underscore-contrib –save 安装。
示例 1:
Javascript
// Defining underscore contrib variable
var _ = require('underscore-contrib');
var given_Object = { 1:"a", 2:"b" };
var obj = _.snapshot(given_Object);;
console.log("Cloned Object: ", obj);
Javascript
// Defining underscore contrib variable
var _ = require('underscore-contrib');
var given_Object = [ 1, 2 ,3 ,4 ];
var obj = _.snapshot(given_Object);;
console.log("Cloned Object: ", obj);
Javascript
// Defining underscore contrib variable
var _ = require('underscore-contrib');
var given_Object = "GeeksforGeeks"
var obj = _.snapshot(given_Object);;
console.log("Cloned Object: ", obj);
Javascript
// Defining underscore contrib variable
var _ = require('underscore-contrib');
var given_Object = 10000;
var obj = _.snapshot(given_Object);;
console.log("Cloned Object: ", obj);
输出:
Cloned Object: { '1': 'a', '2': 'b' }
示例 2:此方法也适用于数组。
Javascript
// Defining underscore contrib variable
var _ = require('underscore-contrib');
var given_Object = [ 1, 2 ,3 ,4 ];
var obj = _.snapshot(given_Object);;
console.log("Cloned Object: ", obj);
输出:
Cloned Object: [ 1, 2, 3, 4 ]
示例 3:此方法也适用于字符串。
Javascript
// Defining underscore contrib variable
var _ = require('underscore-contrib');
var given_Object = "GeeksforGeeks"
var obj = _.snapshot(given_Object);;
console.log("Cloned Object: ", obj);
输出:
Cloned Object: GeeksforGeeks
示例 4:
Javascript
// Defining underscore contrib variable
var _ = require('underscore-contrib');
var given_Object = 10000;
var obj = _.snapshot(given_Object);;
console.log("Cloned Object: ", obj);
输出:
Cloned Object: 10000