Why I am unable to update likes/dislike ?

Mohit Kapoor

0 error but still code not works.

_____________________HTMLfile___________________________________

AngularJS

Language	Likes	Dislikes	Like/Dislike
{{ myindex.name }}	{{ myindex.likes }}	{{ myindex.dislikes }}

------------------------main.js------------------------------------------------

///

var myApp = angular

.module("myModule", [])
.controller("myController",function ($scope) {

var technologies = [

{ name: "C", likes: 0, dislikes: 0 },
{ name: "C++", likes: 0, dislikes: 0 },
{ name: "C#", likes: 0, dislikes: 0 },
{ name: "Objective-C", likes: 0, dislikes: 0 },

];
$scope.technologies = technologies;

var incrementlikes = function (technology) {

technology.likes++;

};
var incrementdislikes = function (technology) {
technology.dislikes++;
};

});

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Bhuvanesh Mohankumar10y ago
Accepted answer
You are sending the "myIndex" value to the function.
function (technology)
Where that "technology" will hold a value only but you are trying to use as the object there, which will not be available.
so, "technology.likes"will be mostly undefined, you can also check that.
Instead you have to get the index value and traverse through the items and then increase the values.
Let me know, if you need more details.
Mark as answer, if helpful.
Mayank9y ago
1. scope bind model to views so need to access function by using the scope in main.js like below:

$scope.incrementlikes = function (technology) {
technology.likes++;
};
$scope.incrementdislikes = function (technology) {
technology.dislikes++;
};

2. need call to correct function in index for dislike button like below:
type="button" value="Dislike" ng-click="incrementdislikes(myindex)"