Nodejs Utililty Methods Object Value Get

Object.prototype.values = function() {
  var v = [];
  for (var p in this) {
    if (this.hasOwnProperty(p)) {
      v.push(this[p]);
  return v;
};
...

Object.values = function(obj) { 
   return Object.keys(obj).map(function(key) { 
      return obj[key]; 
   }); 
};

Object.prototype.hasValue = function(val){
  for (var key in this) {
    if (this.hasOwnProperty(key)) {
      if(this[key]==val){
        return true
  return false
...

Object.prototype.allProperties = function() {
    var prop,
        props = [];
    for(prop in this){
        if(this.hasOwnProperty(prop)){
            props.push(prop);
    return props;
...

Object.isEmpty = function(obj) {
  for (var i in obj) {
    return false;
  return true;