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arr.sort().slice(0,3) 这种可以用吗

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隐形蚂蚱

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

alert('欢迎'+arr.sort().slice(0,3) + '和' + arr.sort().slice(3) + '同学！');

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

为什么要加sort()呢？ alert('欢迎'+arr.slice(0,3) + '和' + arr.slice(3) + '同学！');不是已经可以？

明明明明干

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

题目有写要排序的。请看清楚题目

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