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练习题

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arr.sort(); last = arr.pop(); arr.join(','); //两种console.log都可以 console.log('欢迎'+arr+'和'+last+'同学'); console.log(欢迎${arr}和${last}同学); 结果: 欢迎大军,小明,小红和阿黄同学

Wrysuney

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var arr = ['A', 'B', 'C', 'D', 'E', 'F', 'G']; var aCopy = arr.slice(); aCopy; // ['A', 'B', 'C', 'D', 'E', 'F', 'G'] aCopy === arr; 为什么aCopy===arr;返回的布尔值是false呢 两个数组不是一样的吗,


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