How to access a specific element in an array hash with AngularJS using name or

Question

How to access a specific element in an array hash with AngularJS using name or

Here is an example of an angular array used in a select tag:

var names= [{name: 'Superman', val: '1'}, {name: 'Batman', val: '2'}];
$scope.names =names;
$scope.FormData = {};
$scope.FormData.name = $scope.names[1];

In the above array, how can I select an item using its name or val rather than by index (1):

$scope.FormData.name = $scope.names['2']; #will select the {name: 'Batman', val: '2'}

You can find more details about this topic in a question I posted on Stack Overflow here.

javascript arrays angularjs

Answer 1

Answer №1

Why not utilize the built-in $filter if you are working with angular?

For more information on using $filter, check out: https://docs.angularjs.org/api/ng/filter/filter

In your scenario, if you need to filter in the controller, the following code will return an Array containing all occurrences within names that match the search term 'Superman':

$filter('filter')($scope.names, {name:'Superman'})

If you are sure that there will be at least one match, you can retrieve the first match by doing this:

var matches = $filter('filter')($scope.names, {name:'Superman'});
var match = matches[0]:

Keep in mind that if there are no matches, then match will be undefined

Answer 2

Why not utilize the built-in $filter if you are working with angular?

For more information on using $filter, check out: https://docs.angularjs.org/api/ng/filter/filter

In your scenario, if you need to filter in the controller, the following code will return an Array containing all occurrences within names that match the search term 'Superman':

$filter('filter')($scope.names, {name:'Superman'})

If you are sure that there will be at least one match, you can retrieve the first match by doing this:

var matches = $filter('filter')($scope.names, {name:'Superman'});
var match = matches[0]:

Keep in mind that if there are no matches, then match will be undefined

Answer 3

Answer №2

To create a reusable function, you can implement it in the following way:

$scope.searchItem = function(list, key, value){
    var result = {};
    angular.forEach(list,function(item){
        if(item[key]){
            if(item[key] === value){
                result = item;
            }
        }
    });
    return result;
};

$scope.FormData.title = $scope.searchItem(titles,'title','Superman');

Answer 4

To create a reusable function, you can implement it in the following way:

$scope.searchItem = function(list, key, value){
    var result = {};
    angular.forEach(list,function(item){
        if(item[key]){
            if(item[key] === value){
                result = item;
            }
        }
    });
    return result;
};

$scope.FormData.title = $scope.searchItem(titles,'title','Superman');

Answer 5

Answer №3

If I want to select an item by name in the given array rather than by index (1), how can I achieve this?

To accomplish this, you can utilize the find method from the Lodash library (http://lodash.com/docs#find):

var names= [{name: 'Superman', val: '1'}, {name: 'Batman', val: '2'}];

var matchingBatman = _.find(names, { name: 'Batman' });

The value of matchingBatman will be: {name: 'Batman', val: '2'}

A similar approach can be used to find by val:

var matchingBatman = _.find(names, { val: '2' });

Answer 6

If I want to select an item by name in the given array rather than by index (1), how can I achieve this?

To accomplish this, you can utilize the find method from the Lodash library (http://lodash.com/docs#find):

var names= [{name: 'Superman', val: '1'}, {name: 'Batman', val: '2'}];

var matchingBatman = _.find(names, { name: 'Batman' });

The value of matchingBatman will be: {name: 'Batman', val: '2'}

A similar approach can be used to find by val:

var matchingBatman = _.find(names, { val: '2' });

Answer 7

Answer №4

When seeking an alternative to utilizing a pre-existing library, you can opt to create your own function

function findObjectByProperty(key, value){

    for(var index=0; index< $scope.names.length; index++){
        if($scope.names[index][key] === value){
           return $scope.names[index];
         }
     }

}
$scope.FormData.name  = findObjectByProperty('value','2');

Answer 8

When seeking an alternative to utilizing a pre-existing library, you can opt to create your own function

function findObjectByProperty(key, value){

    for(var index=0; index< $scope.names.length; index++){
        if($scope.names[index][key] === value){
           return $scope.names[index];
         }
     }

}
$scope.FormData.name  = findObjectByProperty('value','2');

How to access a specific element in an array hash with AngularJS using name or

Answer №1

Answer №2

Answer №3

Answer №4

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