- Underscore.JS 教程
- Underscore.JS——主页
- Underscore.JS——概述
- Underscore.JS——环境设置
- Underscore.JS——迭代集合
- Underscore.JS——处理集合
- Underscore.JS——迭代数组
- Underscore.JS——处理数组
- Underscore.JS——函数
- Underscore.JS——映射对象
- Underscore.JS——更新对象
- Underscore.JS——比较对象
- Underscore.JS——实用工具
- Underscore.JS——链接
- Underscore.JS 有用的资源
- Underscore.JS——速查手册
- Underscore.JS——有用的资源
- Underscore.JS——讨论
Underscore.JS——noop 方法
语法
_.noop()
无论将什么作为参数传递,noop 方法都将返回 undefined。此方法对于默认可选回调参数很有用。参见以下示例 -
示例
var _ = require('underscore');
//Example 1: Check if noop returns undefined
console.log(undefined === _.noop());
将上述程序保存在 tester.js 中。运行以下命令以执行此程序。
命令
\>node tester.js
输出
true
underscorejs_utilities.htm
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