wangwen-patsnap

``` let arr = [1, 2, [3, 4, 5, [6, 7], 8], 9, 10, [11, [12, 13]]] arr.toString().split(',') or arr.join(',').split(',') ```

``` function flatAndUnique(target) { return [...new Set(target.join(',').split(','))] } const target = [1, 2, 3, [1, 2, 3, [1, 2, 3, [1, 2, 3, [1, 2, 3, [1, 2, 3]]]]]] flatAndUnique(target)...

good~