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交作业

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AGEN

#1 Created at ... [Delete] [Delete and Lock User]

var lastName=arr.sort().pop()//为了适应更多元素多写一行

console.log('欢迎'+arr.join(',')+'和'+lastName);

Xxxxh

#2 Created at ... [Delete] [Delete and Lock User]

hahaha

console.log(`欢迎${arr.slice(0,arr.length+1).join(",")}同学!`);

console.log(`欢迎${arr.sort().slice(0,arr.length+1).join(",")}同学!`)

console.log('欢迎'+arr.sort().slice(0,arr.length+1).join(',')+'同学!')


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