How can I count the number of data binds in my AngularJS application?
function getScopes(root) {
var scopes = [];
function traverse(scope) {
scopes.push(scope);
if (scope.$$nextSibling)
traverse(scope.$$nextSibling);
if (scope.$$childHead)
traverse(scope.$$childHead);
}
traverse(root);
return scopes;
}
var rootScope = angular.element(document.querySelectorAll("[ng-app]")).scope();
var scopes = getScopes(rootScope);
var watcherLists = scopes.map(function(s) { return s.$$watchers; });
_.uniq(_.flatten(watcherLists)).length;
Reference: http://larseidnes.com/2014/11/05/angularjs-the-bad-parts/
Related
Hi,I was to fetch only the nodes where category = "Tribal" and return it as firebase array object.Thanks in advance.
Angular Service CODE:
this.getSpecialTourPackage = function(){
var dbRef = firebase.database().ref('states').child('itineraries');
return $firebaseArray(dbRef);
};
Angular Controller CODE:
if(_category != undefined && _category == 'Tribal'){
var loadedResult = [];
var resultArray = indiaTourService.getSpecialTourPackage();
resultArray.$loaded().then(function(data){
data.forEach(item =>{
loadedResult.push(item);
$scope.itineraries = _.where(loadedResult,{ category : "Tribal"});
});
});
}
I wrote a litlle program in angular using ui-select. And I wrote a filter that do an OR search in different fields.
Here is my original filter : (whic works perfectly)
app.filter('orSearchFilter', function($parse) {
return function(items, props) {
var out = [];
if (angular.isArray(items)) {
var keys = Object.keys(props);
items.forEach(function(item) {
var itemMatches = false;
for (var i = 0; i < keys.length; i++) {
var prop = $parse(keys[i])(item);
var text = props[keys[i]].toLowerCase();
if (prop && prop.toString().toLowerCase().indexOf(text) !== -1) {
itemMatches = true;
break;
}
}
if (itemMatches) {
out.push(item);
}
});
} else {
out = items;
}
return out;
};
});
And here is my original plunker (which works) : http://plnkr.co/edit/IdqO5dtLXmC6gtqLxRdP?p=preview
The problem is that my filter won't be generic and I will use it in my final code just inside its controller. So, I want to attach it.
Here is the new version of the filter which is attached to the controller : (I didn't do any change...)
$scope.orSearchFilter = function($parse) {
return function(items, props) {
var out = [];
if (angular.isArray(items)) {
var keys = Object.keys(props);
items.forEach(function(item) {
var itemMatches = false;
for (var i = 0; i < keys.length; i++) {
var prop = $parse(keys[i])(item);
var text = props[keys[i]].toLowerCase();
if (prop && prop.toString().toLowerCase().indexOf(text) !== -1) {
itemMatches = true;
break;
}
}
if (itemMatches) {
out.push(item);
}
});
} else {
out = items;
}
return out;
};
};
Finally, in my html, I called this new filter by using this line :
<ui-select-choices group-by="groupByLetter"
repeat="contract in (contracts |
filter : orSearchFilter(contracts, {id.id: $select.search, policy.info.name : $select.search } ) |
orderBy: 'name') track by contract.name">
{{contract.name}} - {{contract.value}} ---- {{contract.id.id}} *** {{contract.policy.info.name }}
</ui-select-choices>
Can you help me please to fix that problem and help me to attach this filter to the scope of the controller?
Thank you !
Use the $filter service to programmatically fetch your filter function.
//Don't forget to inject $filter in your controller ofcourse
$scope.orSearchFilter = $filter('orSearchFilter');
Attach the filter directly to scope:
/* REMOVE constructor function
$scope.orSearchFilter = function($parse) {
return function(items, props) {
*/
// INSTEAD
$scope.orSearchFilter = function(items, props) {
var out = [];
//...
return out;
};
//};
Of course, also be sure that $parse is added to the injectables of the controller construction function.
Hi Im trying my hands on ionic and angularjs. I have a sample code that deals with the phone-list. The working of the code is to add the phone number to the list and delete the selected and also when a number is entered it should check if the number exist there, if the number is not in existence then it should add it. The problem I face here is in checking the existence of the phone number in the list.
link
$scope.phonelist = [];
$scope.add = function() {
$scope.phonelist.push($scope.phone);
$scope.phone = {};
}
$scope.removeSelected = function() {
var i = $scope.phonelist.length;
// reversed loop because you change the array
while (i--) {
var phone = $scope.phonelist[i];
if (phone.checked) {
$scope.phonelist.splice(i, 1);
}
$scope.phonelist = [];
var added;
$scope.add = function() {
added = false;
for (var j=0;j<$scope.phonelist.length;j++) {
if (angular.equals($scope.phonelist[j], $scope.phone)) {
added=true;
}
}
if (!added) {
$scope.phonelist.push($scope.phone);
$scope.phone = {};
} else {
alert('error');
}
}
Update your controller like this for add function . Thanks
I am trying to add methods to an Object's protoype, which will be used in a singleton service and will be initiated only once when the service is created.
angular
.module('app.steps')
.factory('stepsService', stepsService);
stepsService.$inject = [];
/* #ngInject */
function stepsService() {
var steps = new Steps(1,3);
function Steps(current_step, total_steps) {
this.c_step = current_step;
this.t_step = total_steps;
}
Steps.prototype = {
addSteps: function (num) {
this.c_step += num;
},
setLastStep: function () {
this.lastStep = this.c_step = this.t_step;
}
};
var service = {
steps: steps
};
return service;
}
My problem is that although the object is created and initiated successfully, the methods are not there.
What is missing?
As mentioned in the comments, var steps = new Steps(1,3); should be after Steps.prototype = {....}
I'm trying to learn firebase/angularjs by extending an app to use firebase as the backend.
My forge looks like this
.
In my program I have binded firebaseio.com/projects to $scope.projects.
How do I access the children?
Why doesn't $scope.projects.getIndex() return the keys to the children?
I know the items are in $scope.projects because I can see them if I do console.log($scope.projects)
app.js
angular.module('todo', ['ionic', 'firebase'])
/**
* The Projects factory handles saving and loading projects
* from localStorage, and also lets us save and load the
* last active project index.
*/
.factory('Projects', function() {
return {
all: function () {
var projectString = window.localStorage['projects'];
if(projectString) {
return angular.fromJson(projectString);
}
return [];
},
// just saves all the projects everytime
save: function(projects) {
window.localStorage['projects'] = angular.toJson(projects);
},
newProject: function(projectTitle) {
// Add a new project
return {
title: projectTitle,
tasks: []
};
},
getLastActiveIndex: function () {
return parseInt(window.localStorage['lastActiveProject']) || 0;
},
setLastActiveIndex: function (index) {
window.localStorage['lastActiveProject'] = index;
}
}
})
.controller('TodoCtrl', function($scope, $timeout, $ionicModal, Projects, $firebase) {
// Load or initialize projects
//$scope.projects = Projects.all();
var projectsUrl = "https://ionic-guide-harry.firebaseio.com/projects";
var projectRef = new Firebase(projectsUrl);
$scope.projects = $firebase(projectRef);
$scope.projects.$on("loaded", function() {
var keys = $scope.projects.$getIndex();
console.log($scope.projects.$child('-JGTmBu4aeToOSGmgCo1'));
// Grab the last active, or the first project
$scope.activeProject = $scope.projects.$child("" + keys[0]);
});
// A utility function for creating a new project
// with the given projectTitle
var createProject = function(projectTitle) {
var newProject = Projects.newProject(projectTitle);
$scope.projects.$add(newProject);
Projects.save($scope.projects);
$scope.selectProject(newProject, $scope.projects.length-1);
};
// Called to create a new project
$scope.newProject = function() {
var projectTitle = prompt('Project name');
if(projectTitle) {
createProject(projectTitle);
}
};
// Called to select the given project
$scope.selectProject = function(project, index) {
$scope.activeProject = project;
Projects.setLastActiveIndex(index);
$scope.sideMenuController.close();
};
// Create our modal
$ionicModal.fromTemplateUrl('new-task.html', function(modal) {
$scope.taskModal = modal;
}, {
scope: $scope
});
$scope.createTask = function(task) {
if(!$scope.activeProject || !task) {
return;
}
console.log($scope.activeProject.task);
$scope.activeProject.task.$add({
title: task.title
});
$scope.taskModal.hide();
// Inefficient, but save all the projects
Projects.save($scope.projects);
task.title = "";
};
$scope.newTask = function() {
$scope.taskModal.show();
};
$scope.closeNewTask = function() {
$scope.taskModal.hide();
};
$scope.toggleProjects = function() {
$scope.sideMenuController.toggleLeft();
};
// Try to create the first project, make sure to defer
// this by using $timeout so everything is initialized
// properly
$timeout(function() {
if($scope.projects.length == 0) {
while(true) {
var projectTitle = prompt('Your first project title:');
if(projectTitle) {
createProject(projectTitle);
break;
}
}
}
});
});
I'm interested in the objects at the bottom
console.log($scope.projects)
Update
After digging around it seems I may be accessing the data incorrectly. https://www.firebase.com/docs/reading-data.html
Here's my new approach
// Load or initialize projects
//$scope.projects = Projects.all();
var projectsUrl = "https://ionic-guide-harry.firebaseio.com/projects";
var projectRef = new Firebase(projectsUrl);
projectRef.on('value', function(snapshot) {
if(snapshot.val() === null) {
console.log('location does not exist');
} else {
console.log(snapshot.val()['-JGTdgGAfq7dqBpSk2ls']);
}
});
$scope.projects = $firebase(projectRef);
$scope.projects.$on("loaded", function() {
// Grab the last active, or the first project
$scope.activeProject = $scope.projects.$child("a");
});
I'm still not sure how to traverse the keys programmatically but I feel I'm getting close
It's an object containing more objects, loop it with for in:
for (var key in $scope.projects) {
if ($scope.projects.hasOwnProperty(key)) {
console.log("The key is: " + key);
console.log("The value is: " + $scope.projects[key]);
}
}
ok so val() returns an object. In order to traverse all the children of projects I do
// Load or initialize projects
//$scope.projects = Projects.all();
var projectsUrl = "https://ionic-guide-harry.firebaseio.com/projects";
var projectRef = new Firebase(projectsUrl);
projectRef.on('value', function(snapshot) {
if(snapshot.val() === null) {
console.log('location does not exist');
} else {
var keys = Object.keys(snapshot.val());
console.log(snapshot.val()[keys[0]]);
}
});
$scope.projects = $firebase(projectRef);
$scope.projects.$on("loaded", function() {
// Grab the last active, or the first project
$scope.activeProject = $scope.projects.$child("a");
});
Note the var keys = Object.keys() gets all the keys at firebaseio.com/projects then you can get the first child by doing snapshot.val()[keys[0])