Discover the power of manipulating arrays in AngularJS using angular filters

Question

Discover the power of manipulating arrays in AngularJS using angular filters

Let's say I have two Angular filters: translate, which manipulates strings in some way, and sort, which sorts strings alphabetically. I want to display strings from an array str sorted based on their translation. Here is the code I want to make work:

<div ng-repeat="s in strs | translate | sort">{{ s }}</div>

This code doesn't work because translate acts on individual strings and not arrays of strings like I need it to. I need a way to apply translate to arrays such as strs within the Angular expression.

How can I elegantly achieve this functionality in Angular?

For example, if translate converts strings 'a', 'b', 'c' to 'z', 'y', 'x' respectively, I want the HTML output to be:

<div>c</div> <div>b</div> <div>a</div>

javascript angularjs

Answer 1

Answer №1

If the translation tool you're using doesn't have built-in support for translating arrays, one workaround is to create a custom filter in your project:

angular.module("mymodule", ["pascalprecht.translate"]);
angular.module("mymodule").config(function($translateProvider) {
  // Define message keys and translations
  $translateProvider.translations('en', {
    A: 'Apple',
    B: 'Banana'
  })
}).run(function($translate) {
  // Set default language to English
  $translate.use("en");
})
/**
 * @filter translateArray
 * @description Converts an array of message IDs 
 * into an array of translated messages using the `$translate` service
 * @param {Array<String>} translationIDs - Array of message keys
 * @returns {Array<String>} - Array of translated strings.
 */
.filter("translateArray", function($translate) {
  return function(translationIDs) {
    return translationIDs.map(function(id) {
      return $translate.instant(id);
    })
  };
}).controller("demoController", function($scope) {
  // Template will translate then sort, displaying:
  // Apple, Banana
  $scope.strs = ["B", "A"];
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.9/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-translate/2.10.0/angular-translate.min.js"></script>

<body ng-app="mymodule">
  <div ng-controller="demoController">
    <div ng-repeat="s in (strs | translateArray | orderBy:'toString()')">{{s}}</div>
  </div>
</body>

Answer 2

If the translation tool you're using doesn't have built-in support for translating arrays, one workaround is to create a custom filter in your project:

angular.module("mymodule", ["pascalprecht.translate"]);
angular.module("mymodule").config(function($translateProvider) {
  // Define message keys and translations
  $translateProvider.translations('en', {
    A: 'Apple',
    B: 'Banana'
  })
}).run(function($translate) {
  // Set default language to English
  $translate.use("en");
})
/**
 * @filter translateArray
 * @description Converts an array of message IDs 
 * into an array of translated messages using the `$translate` service
 * @param {Array<String>} translationIDs - Array of message keys
 * @returns {Array<String>} - Array of translated strings.
 */
.filter("translateArray", function($translate) {
  return function(translationIDs) {
    return translationIDs.map(function(id) {
      return $translate.instant(id);
    })
  };
}).controller("demoController", function($scope) {
  // Template will translate then sort, displaying:
  // Apple, Banana
  $scope.strs = ["B", "A"];
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.9/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular-translate/2.10.0/angular-translate.min.js"></script>

<body ng-app="mymodule">
  <div ng-controller="demoController">
    <div ng-repeat="s in (strs | translateArray | orderBy:'toString()')">{{s}}</div>
  </div>
</body>

Discover the power of manipulating arrays in AngularJS using angular filters

Answer №1

Similar questions

Resolving the $rootScope:infdig infinite looping issue

React: A functional component triggers both onClick events

Tips for executing both onclick events and a href links simultaneously

Secure a RESTful API with a Keycloak access token in a Node.js environment

Retrieve the output of a JavaScript function and submit it as extra form data

Verify registration by sending an email to an alternate email address through Angular Firebase

Modifying HTML line codes using Python: A step-by-step guide

Submit information in two different formats; the initial format will not transmit any data until the second one is completed

"Utilizing Angular's ng-repeat to house multiple select dropdown

Steps for eliminating an element using jQuery from a variable filled with HTML code

Showing a heading based on a value in Angular: A Complete Guide

The status of the xmlhttp object remains unchanged

What steps might one take to address the undefined property error in node.js?

Updating the mat-icon in a row when a button is clicked

The execution of the return statement in the catch block is unsuccessful

What is the best way to prevent users from entering a zero in the first position of a text box using JavaScript

Extending the declaration of JavaScript native methods is not possible when using TypeScript

What is the best method for embedding JSON data into a script tag within a Zope Chameleon template?

Website experiences technical difficulties but database remains up-to-date

Buttons for concealment and revelation are unresponsive