ES6 array de duplication new set()

Ordinary Array weight removal

    var b = [...new Set([1,2, 3, 4, 5, 5, 5, 5])]
 
    console.log(b);

 

De duplication of array containing objects

    var o ={a:1}
    var b = [...new Set([o, o, 3, 4, 5, 5, 5, 5])]
    console.log(b);

Output results ：

  There is a hole in the array containing objects , You need to pay attention to ：

    var b = [...new Set([{'a':1}, {'a':1}, 3, 4, 5, 5, 5, 5])]
    console.log(b);

Because every object is unique , So the two objects in this array cannot be duplicated

 

  Remove duplicate characters from the string

[...new Set('ababbc')].join('')
// "abc"