Nodejs Array Move move(oldIndex, newIndex)

Method Source Code

Array.prototype.move = function(oldIndex, newIndex) {

  if (isNaN(newIndex) || isNaN(oldIndex) || oldIndex < 0 || oldIndex >= this.length) {
    return;/*from   www.  j  a va 2  s  . co  m*/
  }

  if (newIndex < 0) {
    newIndex = this.length - 1;
  } else if (newIndex >= this.length) {
    newIndex = 0;
  }

  this.splice(newIndex, 0, this.splice(oldIndex, 1)[0]);

  return newIndex;
};

Related

1. move(from, to)

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

2. move(from, to)

   Array.prototype.move = function(from, to) {
       if (Object.prototype.toString.call(this) !== '[object Array]') {
           throw new TypeError("`this` must be Array, not " + typeof this);
       if (typeof from !== 'number') {
           throw new TypeError("argument[0] must be number, not " + typeof from);
       if (typeof to !== 'number') {
           throw new TypeError("argument[1] must be number, not " + typeof to);
   ...
   

3. move(from, to)

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

4. move(from, to)

   Array.prototype.move = function(from, to) {
     if (from >= this.length) return 'no target'
     var a = this.concat()
     var e = a.splice(from, 1)[0]
     if (to > a.length) {
       a[to] = e
     } else {
       a.splice(to, 0, e)
     return a
   var ArrayTest = ['a', 'b', 'e']
   console.log("the origin array below")
   console.log(ArrayTest.toString())
   var newArr = ArrayTest.move(0, 2)
   console.log((newArr).toString() + "\nWE DID ITTT :D")
   

5. move(oldIndex,newIndex)

   Array.prototype.move = function(oldIndex,newIndex){
     return this.splice(newIndex, 0, this.splice(oldIndex, 1)[0]);
   

6. move(old_index, new_index)

   Array.prototype.move = function(old_index, new_index) {
     if (new_index >= 0 && new_index < this.length)
     this.splice(new_index, 0, this.splice(old_index, 1)[0]);
     return this;
   };
   

7. move(old_index, new_index)

   Array.prototype.move = function (old_index, new_index) {
     if (new_index >= this.length) {
       let k = new_index - this.length;
       while ((k--) + 1) {
         this.push(undefined);
     this.splice(new_index, 0, this.splice(old_index, 1)[0]);
     return this; 
   ...
   

8. move(old_index, new_index)

   Array.prototype.move = function (old_index, new_index) {
       if (new_index >= this.length) {
           var k = new_index - this.length;
           while ((k--) + 1) {
               this.push(undefined);
       this.splice(new_index, 0, this.splice(old_index, 1)[0]);
       return this; 
   ...