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js运用扩展操作符(…)简化代码,简化数组合并
2022-07-27 14:23:00 【讲礼貌】
let arr1 = [20, 30];
//普通写法
let arr2 = arr1.concat([60, 80]); // [20, 30, 60, 80]
// 简写
let arr2 = [...arr1, 60, 80]; // [20, 30, 60, 80]
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