Set set

One 、 Statement set aggregate

var x = new Set();
var y = new Set(['qiku', 123, 123, true]); 

Two 、 Add data

x.add('qiku');
x.add(1);
x.add(15);

3、 ... and 、 Delete data

var w = x.delete(77); Delete a data

x.clear(); Empty data

Four 、 lookup

console.log(y.has('qiku')); //true return true or false

5、 ... and 、 modify ( Replace )

if (y.delete(123)) {
        y.add(88);
  }

6、 ... and 、 Traverse

var s = y.forEach(function(value) {
				console.log(value);
			})

 console.log(y.size); The length of the array

7、 ... and 、keys /values /entries

        console.log(y.keys())
			for (let i of y.keys()) {
				console.log(i)
			}
			console.log(y.values())
			for (let i of y.values()) {
				console.log(i)
			}
			console.log(y.entries())
			for (let [i, j] of y.entries()) {
				console.log(i, j)
			}

8、 ... and 、 Whether it is equal or not

function Person(name, age, sex) {
                this.name = name;
                this.age = age;
                this.sex = sex;
            }
            var z = new Person(' Zhang San ', 18, ' male ');
            var a = new Person(' Zhang San ', 18, ' male ');
            console.log(a == z);

Not equal

Nine 、 Additive data

            var b = new Set(['qiku', 123, 123, true]);
			var c = new Set([1, 2, 'qiku', 123, 123, true]);
			var arr1 = Array.from(b);
			var arr2 = Array.from(c);
			console.log(new Set(arr1.concat(arr2)));