source , destination, callback) source、destination對應的是Redis中串列的key，rpoplpush將source 列表最後一個元素移除，並將移除的元素新增destination列表作為第一個元素。
(1) 實作rpoplpush之前，先創建source列表資料。
(2) 第一次執行rpoplpush，destination列表不需要事先創建。
(2) 第二次執行rpoplpush
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const source_list = ['iphone4', 'iphone3', 'iphone2', 'iphone1'];
client.rpush('src', source_list);
client.lrange('src', 0, -1, redis.print);Reply: iphone4,iphone3,iphone2,iphone1client.rpoplpush('src', 'dst', (err, popItem) => {
console.log('First pop:', popItem);
});
client.lrange('src', 0, -1, redis.print);
client.lrange('dst', 0, -1, redis.print);First pop: iphone4
Reply: iphone1,iphone2,iphone3
Reply: iphone4client.rpoplpush('src', 'dst', (err, popItem) => {
console.log('Second pop:', popItem);
});
client.lrange('src', 0, -1, redis.print);
client.lrange('dst', 0, -1, redis.print);Second pop: iphone3
Reply: iphone1,iphone2
Reply: iphone3,iphone4