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Instead of getting pushed to array I get error

By : Wael Al-safery
Date : October 17 2020, 08:10 AM
will help you
enter the value. (expense, buy car, 2500) and it should push to an array in the data object, instead i keep getting and error on line 30.
code :

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Adding a function to Array.prototype in IE results in it being pushed in to every array as an element

By : JulieAH
Date : March 29 2020, 07:55 AM
this will help It's not being "pushed" into every array; you added a property to the prototype object, so it's visible and enumerable in every array instance. That's how prototype properties are supposed to work.
It works in Chrome and Firefox because .find() on the prototype in those environments is defined in such a way as to be visible but not enumerable. You can do that in IE by using Object.defineProperty():
code :
if (!Array.prototype.find) {
  Object.defineProperty(Array.prototype, "find", {
    value: function(predicate) {
      if (this === null) {
        throw new TypeError('Array.prototype.find called on null or undefined');
      if (typeof predicate !== 'function') {
        throw new TypeError('predicate must be a function');
      var list = Object(this);
      var length = list.length >>> 0;
      var thisArg = arguments[1];
      var value;

      for (var i = 0; i < length; i++) {
        value = list[i];
        if (predicate.call(thisArg, value, i, list)) {
          return value;
      return undefined;

Data no longer being pushed inside an array after moving another (related) array into a .json

By : user5055741
Date : March 29 2020, 07:55 AM
help you fix your problem I had this plnkr, working with an array. It had some problems (data being pushed into two arrays), but it was doing its job. Now I moved that array into a .json, and pizze.n is no longer being pushed into $scope.pizze nor $scope.orderList. I guess at this point a good solution would be to create a second .json and use it as my new orderList, or am I wrong? By the way, how do I do it or a better solution? Here's the updated code. , You haven't returned a promise from your factory. Change to:
code :
return {
    getdata: function() {
        return $http.get('json/pizze.json').then(function(data) {
            return data;

Modify the object that is pushed in an array when using an array.push that calls a function in Angular/JavaScript *array

By : pradeep kumar
Date : March 29 2020, 07:55 AM
seems to work fine You should pass the entire object in your function keywordProfileID
Something like,
code :
function findKeywordProfile(brandProfileID) {
  var keywordProfileID = $q.defer();
  pullSocialMediaData('list_keyword_profiles.json').then(function (data) {
      var keywordProfileInstance = data.filter(function (keyword) {
          return keyword.brand_profile_id === brandProfileID;
      keywordProfileID.resolve({id: keywordProfileInstance[0].id, name: keywordProfileInstance[0].id, keyID: keyword});
  return keywordProfileID.promise;

How to display error messages when duplicate values are pushed into an array AngularJS

By : Leszek Czupryniak
Date : March 29 2020, 07:55 AM
Hope that helps I guess you need something like that, with some customization, of course:
code :
$scope.saveUser = function() {
    const isEmailDuplicated = !!$scope.users.find(user => $scope.newUser.email === user.email);
    const isNameDuplicated = !!$scope.users.find(user => $scope.newUser.lastName === user.lastName);
    const isContactDuplicated = !!$scope.users.find(user => $scope.newUser.contact === user.contact);
    if (isEmailDuplicated || isNameDuplicated || isContactDuplicated) {
        console.log("The user with such profile data already exists");
    } else {
        console.log("New User Added Successfully!");

what occurs if an element is pushed onto an array during the execution of a loop through that array using the map method

By : user2994233
Date : March 29 2020, 07:55 AM
it should still fix some issue You don't really need to test this; The ECMAScript spec is clear:
code :
const arr = [5];

const result = arr.map( x => {
  console.log( `Visiting ${x}` );
  arr.push( x + 1 );
  return 2*x;
} );

console.log( arr ); // Has two elements

console.log( result ); // Only has one element
const arr = [0,0];

const result = arr.map( x => {
  console.log( `Visiting ${x}` );
  arr[1] = 3;
  return 2*x;
} );

console.log( result );
const arr = [0,1,2,3,4,5];

// Change a random value in arr every 4 milliseconds
//    Emulates Firebase modifying the array
setInterval( function ( ) {
  arr[~~(Math.random()*6)] = Math.random( );
}, 4 );

// (async), Logs values after they've been modified
setTimeout( function ( ) {
  console.log( 'Logging array values after one second' );
  arr.map( x => console.log( x ) );
}, 1000 );

// Logs the values unmodified, async code, such as Firebase can't affect this
console.log( '(sync) with a 100ms spinlock between each map callback, to demonstrate that the array cannot be modified externally during the map.' );
arr.map( x => {
  console.log( x );
  const start = +new Date;
  while( +new Date < start + 100 ); // Wait for 100 milliseconds
} );
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