/**
* 数组扁平化
* @Author susu
* @Date 2023-4-3
* @param {*} arr 数组
* @returns []
*/
const flatten = (arr) => {
return arr.reduce((prev, curValue) => {
return prev.concat(Array.isArray(curValue) ? flatten(curValue) : curValue);
}, []);
};
console.log(
flatten([
[1, 2, 3],
[4, 5, 6],
]),
);