Nodejs Array Include includes(val)

Method Source Code

Array.prototype.includes = function (val) {
  var returnValue = false;
  this.forEach(function (el, i){
    if (val === el) {
      returnValue = true;//from ww w .  j a v a2s . co  m
    }
  });
  return returnValue;
};

var Student = function(name){
  this.name = name;
  this.courses = [];
  this.courseLoad = {};
};

Student.prototype.enroll = function(course) {
  if (!this.courses.includes(course)) {
    this.courses.push(course);
    this.courseLoad[course.name] = course.numCredits
    course.add_student(this);
  }
};

var Course = function(name, department, numCredits, day, time) {
  this.name = name;
  this.department = department;
  this.numCredits = numCredits;
  this.day = day;
  this.time = time;
  this.students = [];
};

Course.prototype.add_student = function(student){
  this.students.push(student);
};

Related

1. includes(searchElement /*, fromIndex*/ )

   if (![].includes) {
     Array.prototype.includes = function(searchElement  ) {
       if (this === undefined || this === null) {
         throw new TypeError('Cannot convert this value to object');
       var O = Object(this);
       var len = parseInt(O.length, 10) || 0;
       if (len === 0) {
         return false;
   ...
   

2. includes(searchElement /*, fromIndex*/)

   if (!Array.prototype.includes) {
     Array.prototype.includes = function(searchElement ) {
       'use strict';
       if (this == null) {
         throw new TypeError('Array.prototype.includes called on null or undefined');
       var O = Object(this);
       var len = parseInt(O.length, 10) || 0;
       if (len === 0) {
   ...
   

3. includes(searchElement)

   Array.prototype.includes = function(searchElement) {  
       var O = Object(this);
       var len = parseInt(O.length) || 0;
       if (len === 0) {
         return false;
       var n = parseInt(arguments[1]) || 0;
       var k;
       if (n >= 0) {
   ...
   

4. includes(target)

   Array.prototype.includes = function (target) {
     var result = false
     this.forEach(function (el) {
       if (el == target) {
         result = true
     });
     return result;
   

5. includes(target)

   Array.prototype.includes = function(target) {
     for(var i in this) {
       if(this[i] === target) {
         return true;
       };
     };
     return false;
   };
   

6. includes(val)

   var bubbleSort = function (arr) {
     var notSorted = true
     while (notSorted) {
       notSorted = false;
       for (var i = 0; i <= arr.length-2; i++) {
         var j = i+1;
         if (arr[j] < arr[i]) {
           var temp = arr[j];
           arr[j] = arr[i];
   ...
   

7. includes(val, from)

   Array.prototype.includes = function(val, from) {
       return this.indexOf(val, from) !== -1;
   

8. includes(value)

   window.IS_ELECTRON = window.process ? true : false
   if (!window.IS_ELECTRON)
     window.require = () => ({})
   Array.prototype.includes = function(value) {
     return this.some(element => element === value)
   

9. includes(value)

   Array.prototype.includes = function(value) {
       return jQuery.inArray(value, this) > -1;