Array.from()

        let a = Array.from(‘foo‘); 
        console.log(a)  // [ "f", "o", "o" ]

        const set = new Set([‘foo‘, ‘bar‘, ‘baz‘, ‘foo‘]);
        let a = Array.from(set);
        console.log(a) // [ "foo", "bar", "baz" ]

        const map = new Map([[1, 2], [2, 4], [4, 8]]);
        let a = Array.from(map);
        console.log(a) //  [[1, 2], [2, 4], [4, 8]]

        function f() {
            return Array.from(arguments);
        }
        let a = f(1, 2, 3);
        console.log(a)// [ 1, 2, 3 ]

       let a = Array.from([1, 2, 3], x => x + x);
        console.log(a)// [2, 4, 6]