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pair javascript / rehabilitate envelope chinese_casual ordering AB effort low
verdictpicked javascript (first-offered)  ·  classifierA · tiernone

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您的问题不太明确,我猜您可能想问以下其中一个:

## 1. JavaScript 中的"或"运算符

**逻辑或 `||`**
```javascript
let a = false || "默认值";  // "默认值"
let b = 0 || 100;           // 100(0 是假值)

// 常用于设置默认值
function greet(name) {
  name = 

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