Nodejs Utililty Methods Array Remove by Index

Array.prototype.removeAtIndex = function(index) {
  this.splice(index, 1);
};

Array.prototype.removeAtIndex = function(index){
  if (typeof(index) !== "number") {
    throw new Error("Input argument was not a number");
  } else if (index >= this.length || index < 0) {
    throw new Error("Input index is out of range");
  } else {
    var index = Math.floor(index);
    this.splice(index, 1);
    return this;
...

Array.prototype.removeByIndex = function(i) {
   return this.splice(idx, 1);

Array.prototype.removeByIndex = function (index) {
    var tempList = Array();
    for (var i = 0, a = 0; i < this.length; i++) {
        if (i != index) {
            tempList[a] = this[i];
            a++;
    this.setArray(tempList);
...

Array.prototype.removeByIndex = function(index){
  var i=0,n=0;
  for(i=0;i<this.length;i++){
    if(this[i]!=this[index]){
      this[n++]=this[i];
  if(n<i){
    this.length = n;
...

Array.prototype.removeByIndex = function(index){
  var i=0,n=0;
  var arrSize = this.length;
  for(i=0;i<arrSize;i++){
    if(this[i] != this[index]){
      this[n++]=this[i];
  if(n<i){
...

Array.prototype.removeIndex = function(index) {
    if (index > -1) {
        this.splice(index, 1);
};

Array.prototype.removeIndexAt = function(idx) {
    return this.slice(0, idx).concat(this.slice(idx + 1));
};

Array.prototype.removeIndexes = function(indexes){
  for (var i = 0; i < indexes.length; i++) this.splice(indexes[i], 1);