Nodejs Utililty Methods Array Last

Array.prototype.last = function () {
  return this.pop();
};

Array.prototype.last = function() {
    if (this.length > 0) {
        return this[this.length - 1]
};

Array.prototype.last = function() {
  if ( this.length === 0 ) {
    return;
  return this[ this.length - 1 ];
};

if(!Array.prototype.last) {
    Array.prototype.last = function() {
        return this[this.length - 1];

Array.prototype.last = function() {
  return this[this.length - 1];
};

function p(msg, obj) {
  if (window.console != undefined) {
    console.debug(msg, obj);
  } else {
    console.log(msg+": "+obj);
function warning(msg) {
  if (window.console != undefined) {
...

Array.prototype.last = function() {
  return this[this[(this.length - 2)]]
const ok = [1, 2, 234234]
console.log(ok.last())
const Demo = self => {
  self.state = {wow: "wow", nice: "nice"}
  self.methods = {
    setState: newState => {
...

Array.prototype.last = function() {
    return this[this.length - 1];
};

Array.prototype.last = function(){
  return this[this.length-1];
Array.prototype.first = function(){
  return this[0];
Array.prototype.removeAtIndex = function(index){
  this.splice(index,1);

Array.prototype.last = function () {
    if (this.length > 0)
        return this[this.length - 1];
    else
        return undefined;