# rpop & lpop

### 1. 基本語法

#### rpop**(`key` , `callback`)** 

刪除並回傳`key`對應串列最後一個元素。

#### lpop**(`key` , `callback`)** 

刪除並回傳`key`對應串列中第一個元素。

{% tabs %}
{% tab title="TypeScript" %}

```typescript
client.rpush('uid:3', 'U001', 'U002', 'U003','U004', 'U005');
client.lrange('uid:3', 0, -1, redis.print);

client.rpop('uid:3', (err, popItem) => {
    console.log(popItem);
});

client.lrange('uid:3', 0, -1, redis.print);
```

{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="Output-TS" %}

```
Reply: U001,U002,U003,U004,U005
U005
Reply: U001,U002,U003,U004
```

{% endtab %}
{% endtabs %}


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