The main method used Array.from
1, array -> set (array to a set)
let array = [1, 2, 3, 4]; let set = new Set(array);
2、set --> array
let demo = new Set([1,2,3,4]); Array.from(demo)
The main method used Array.from
let array = [1, 2, 3, 4]; let set = new Set(array);
let demo = new Set([1,2,3,4]); Array.from(demo)