- Underscore.JS 教程
- Underscore.JS——主頁
- Underscore.JS——概述
- Underscore.JS——環境設定
- Underscore.JS——迭代集合
- Underscore.JS——處理集合
- Underscore.JS——迭代陣列
- Underscore.JS——處理陣列
- Underscore.JS——函式
- Underscore.JS——對映物件
- Underscore.JS——更新物件
- Underscore.JS——比較物件
- Underscore.JS——實用工具
- Underscore.JS——連結
- Underscore.JS 有用的資源
- Underscore.JS——速查手冊
- Underscore.JS——有用的資源
- Underscore.JS——討論
Underscore.JS——noop 方法
語法
_.noop()
無論將什麼作為引數傳遞,noop 方法都將返回 undefined。此方法對於預設可選回撥引數很有用。參見以下示例 -
示例
var _ = require('underscore');
//Example 1: Check if noop returns undefined
console.log(undefined === _.noop());
將上述程式儲存在 tester.js 中。執行以下命令以執行此程式。
命令
\>node tester.js
輸出
true
underscorejs_utilities.htm
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