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function flatArr(arr) {
return [...new Set(arr.flat(Infinity))].sort((a, b) => a - b);
}
Array.prototype.join & Array.toString 方法
// join 方法
function flatArr(arr) {
return [...new Set(arr.join().split(','))].sort((a, b) => a - b);
}
// toString 方法
function flatArr(arr) {
return [...new Set(arr.toString().split(','))].sort((a, b) => a - b);
}
flat api
Array.prototype.join & Array.toString 方法
这两种方式存在的缺陷是会将数组中的每一个元素转化为字符串,即:
如:
函数递归拍平数组
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