zhangguixu/sourcecode/sourcecode-2

Claude Code and agent skill by zhangguixu/sourcecode

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Install

npx vskill@latest install zhangguixu/sourcecode/sourcecode-2

SKILL.md

JavaScript小技巧

来源：https://annatarhe.github.io/2016/04/19/hack-js-code.html

类型转换

1. 转为boolean

javascript
!!'foo' // true
!!0 //false

2. 转为number

javascript
+'45'
+new Date //转为数字

***3. ~~*

~是一个按位取非的操作，返回数值的反码，是二进制操作，JavaScript中的number都是double类型的，在位操作的时候会转化为int，两次就还是原来的数

javascript
~~3.1415 // 3 等同于parseInt()
~~5.678 //5

IIFE

创建一个函数作用域，防止全局污染，

javascript
(function (arg) {
    //作用域
});

Closure

闭包：有权访问外部函数作用域的函数，作用是封装，保存变量的状态

javascript
var counter = function() {
    counter = 0 ;
    return function() {
        return count++;
    }
}

Security

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Source

Popularity

Repository stars
57
Repository forks
30
7-day trend score
20

Stars and forks are for the whole GitHub repository, not this skill alone. Refreshed 18 Mar 2026, 7 months ago.

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