Retrieving Values from Array with AngularJS Keys - A How-To Guide

Question

Retrieving Values from Array with AngularJS Keys - A How-To Guide

I need to access a specific value from a key inside an array, like this:

   $scope.result = [
{

    "key":"logo_big",
    "value":"/assets/images/aaa.jpg"
    },
    {
    "key":"logo_small",
    "value":"/assets/images/logo94x57Bis.png"
    },
    {
    "key":"project_name",
    "value":"Company"
    },
    {
    "key":"support_email",
    "value":"<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5337362513343e323a3f7d303c3e">[email protected]</a>"
    }
    ];

How can I retrieve the value of 'logo_big'?

$scope.result['logo_big']

This currently returns undefined.

javascript angularjs arrays

Answer 1

Answer №1

let logo = $scope.results.find(item => item.name === "logo_big");

For more information, check out the MDN documentation on find method

Answer 2

let logo = $scope.results.find(item => item.name === "logo_big");

For more information, check out the MDN documentation on find method

Answer 3

Answer №2

One way to retrieve the element with a specific key from an array is by iterating through the array until you find the desired element.

If your system supports Array.find() method, you can use it for a more efficient solution:

var targetElement = $scope.result.find(function(item) {
    return item.key === 'logo_big';
});
return targetElement && targetElement.value;

Alternatively, you can resort to using filter as a workaround:

var targetElement = $scope.result.filter(function(item) {
    return item.key === 'logo_big';
})[0];
return targetElement && targetElement.value;

Answer 4

One way to retrieve the element with a specific key from an array is by iterating through the array until you find the desired element.

If your system supports Array.find() method, you can use it for a more efficient solution:

var targetElement = $scope.result.find(function(item) {
    return item.key === 'logo_big';
});
return targetElement && targetElement.value;

Alternatively, you can resort to using filter as a workaround:

var targetElement = $scope.result.filter(function(item) {
    return item.key === 'logo_big';
})[0];
return targetElement && targetElement.value;

Answer 5

Answer №3

To access elements in an array of objects, you can use the following code snippet:

for (let index = 0; index < dataArray.length; index++) 
{
  if (dataArray[index]["property"] === "value") 
  {
    console.log("Value found!");
  } 
}

Answer 6

To access elements in an array of objects, you can use the following code snippet:

for (let index = 0; index < dataArray.length; index++) 
{
  if (dataArray[index]["property"] === "value") 
  {
    console.log("Value found!");
  } 
}

Answer 7

Answer №4

If you prefer to handle this in an angular-friendly manner, utilize angular.forEach and verify the object's key

angular.forEach($scope.result, function(obj) {
      if (obj.key == "logo_big") {
        $scope.resultObj = obj.value;
        alert($scope.resultObj);
      }

DEMO

var app = angular.module("app", []);
app.controller("listController", ["$scope", function($scope) {
  $scope.name = 'StackOverflow';
  $scope.result = [{
    "key": "logo_big",
    "value": "/assets/images/aaa.jpg"
  }, {
    "key": "logo_small",
    "value": "/assets/images/logo94x57Bis.png"
  }, {
    "key": "project_name",
    "value": "Company"
  }, {
    "key": "support_email",
    "value": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="6a0e0f1c2a0d070b030644090507">[email protected]</a>"
  }];

  angular.forEach($scope.result, function(obj) {
    if (obj.key == "logo_big") {
      $scope.resultObj = obj.value;
    }
  });

}]);

<!DOCTYPE html>
<html ng-app="app">

<head>
  <script src="https://code.angularjs.org/1.4.7/angular.js"></script>
  <link rel="stylesheet" href="style.css" />
  <script src="script.js"></script>
</head>

<body ng-controller="listController">
  <h3>Enter an ID</h3>
   <h1> {{resultObj}}</h1>
</body>

</html>

Answer 8

If you prefer to handle this in an angular-friendly manner, utilize angular.forEach and verify the object's key

angular.forEach($scope.result, function(obj) {
      if (obj.key == "logo_big") {
        $scope.resultObj = obj.value;
        alert($scope.resultObj);
      }

DEMO

var app = angular.module("app", []);
app.controller("listController", ["$scope", function($scope) {
  $scope.name = 'StackOverflow';
  $scope.result = [{
    "key": "logo_big",
    "value": "/assets/images/aaa.jpg"
  }, {
    "key": "logo_small",
    "value": "/assets/images/logo94x57Bis.png"
  }, {
    "key": "project_name",
    "value": "Company"
  }, {
    "key": "support_email",
    "value": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="6a0e0f1c2a0d070b030644090507">[email protected]</a>"
  }];

  angular.forEach($scope.result, function(obj) {
    if (obj.key == "logo_big") {
      $scope.resultObj = obj.value;
    }
  });

}]);

<!DOCTYPE html>
<html ng-app="app">

<head>
  <script src="https://code.angularjs.org/1.4.7/angular.js"></script>
  <link rel="stylesheet" href="style.css" />
  <script src="script.js"></script>
</head>

<body ng-controller="listController">
  <h3>Enter an ID</h3>
   <h1> {{resultObj}}</h1>
</body>

</html>

Retrieving Values from Array with AngularJS Keys - A How-To Guide

Answer №1

Answer №2

Answer №3

Answer №4

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