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

The splice() method adds/removes items to/from an array, and returns the removed item(s).

Note: This method changes the original array. /w3schools/

Array.prototype.move = function(from,to){
  this.splice(to,0,this.splice(from,1)[0]);
  return this;
};

var arr = [ 'a', 'b', 'c', 'd', 'e'];
arr.move(3,1);//["a", "d", "b", "c", "e"]


var arr = [ 'a', 'b', 'c', 'd', 'e'];
arr.move(0,2);//["b", "c", "a", "d", "e"]

as the function is chainable this works too:

alert(arr.move(0,2).join(','));

demo here