Move an array element from one array position to another

Question

I\'m having a hard time figuring out how to move an array element. For example, given the following:

var arr = [ \'a\', \'b\', \'c\', \'d\', \'e\'];
<         


        

Answer 1

    let oldi, newi, arr;
    
    if(newi !== oldi) {
      let el = this.arr.splice(oldi, 1);
      if(newi > oldi && newi === (this.arr.length + 2)) {
        this.arr.push("");
      }
      this.arr.splice(newi, 0, el);
      if(newi > oldi && newi === (this.arr.length + 2)) {
        this.arr.pop();
      }
    }