# 命名

* `Boolean` 值命名最好是 has, is 開頭

```javascript
// bad
let called = false

// good
let hasBeenCalled = false
```





#### **for 裡的 argument**

| Argument | Naming |   |
| -------- | ------ | - |
| function | fn     |   |
|          |        |   |
|          |        |   |
