Splitting a string in Angular.JS using ng-repeat

Question

Splitting a string in Angular.JS using ng-repeat

Just diving into the world of Angular.JS and grappling with the concept of implementing ng-repeat.

Within my scope, I have a data object derived from JSON fetched from my database. Among the returned 'fields', one particular field can either be a single string or an array.

For instance:

Email Address = "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="117c7451657462653f727e7c">[email protected]</a>" or
Email Address = ["<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="5e333b6f1e2a3b2d2a703d3133">[email protected]</a>", "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="670a025527130214134904080a">[email protected]</a>", "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="6d00085e2d19081e19430e0200">[email protected]</a>"]

What I want to achieve is to display whatever content the Email Address field holds within a series of spans. Here is what I've tried so far:

<span ng-repeat="EMAIL_ADDRESS in data.EMAIL_ADDRESS">
    <span>{{EMAIL_ADDRESS}}</span><br />
</span

When Email Address is an array of 3, it displays as intended:

    <span><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4e232b7f0e3a2b3d3a602d2123">[email protected]</a></span><br />
    <span><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="ee838bdcae9a8b9d9ac08d8183">[email protected]</a></span><br />
    <span><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="ee838bddae9a8b9d9ac08d8183">[email protected]</a></span><br />

But when Email Address is just a string, it displays like this:

    <span>m</span><br />
    <span>e</span><br />
    <span>@</span><br />
    <span>t</span><br />
    <span>e</span><br />
    <span>s</span><br />
    <span>t</span><br />
    <span>.</span><br />
    <span>c</span><br />
    <span>o</span><br />
    <span>m</span><br />

How can I avoid this scenario? It seems to be related to JavaScript behavior, and I'm unsure how to handle it within Angular.

javascript angularjs angularjs-ng-repeat

Answer 1

Answer №1

If you find yourself unable to modify the object retrieved from the database or need to perform this operation on multiple variables, consider creating a function that converts the string into an array. This will prevent your ng-repeat directive from parsing it unnecessarily.

You can create a function directly in your controller like this:

$scope.transformStringToArray = function(objectFromDB) {
    if (!angular.isArray(objectFromDB)) {
        return [objectFromDB];
    } else {
        return objectFromDB;
    }
}

Then simply call the function with your data:

<span ng-repeat="EMAIL_ADDRESS in transformStringToArray(data.EMAIL_ADDRESS)">

Answer 2

If you find yourself unable to modify the object retrieved from the database or need to perform this operation on multiple variables, consider creating a function that converts the string into an array. This will prevent your ng-repeat directive from parsing it unnecessarily.

You can create a function directly in your controller like this:

$scope.transformStringToArray = function(objectFromDB) {
    if (!angular.isArray(objectFromDB)) {
        return [objectFromDB];
    } else {
        return objectFromDB;
    }
}

Then simply call the function with your data:

<span ng-repeat="EMAIL_ADDRESS in transformStringToArray(data.EMAIL_ADDRESS)">

Answer 3

Answer №2

If you follow the Angular approach, you would format the data after receiving it. For instance, if the value is a string, replace it with an array containing that value. By doing this, your template will consistently receive results, and your controller logic will manage data structures consistently.

Update: I suggest not directly binding the raw data returned from the server to the $scope. It's beneficial to introduce a level of separation between server data names/types and client data to facilitate future changes without strong coupling.

JavaScript:

$http.get('/my/data').success(function(data) {
  // Data transformation and binding would be done here
  if(angular.isArray(data.EMAIL_ADDRESS)) {
    $scope.emailAddresses = data.EMAIL_ADDRESS;
  else {
    $scope.emailAddresses = [data.EMAIL_ADDRESS];
  }
});

HTML:

<span ng-repeat="emailAddress in emailAddresses">

This approach ensures that your templates are not tightly bound to server API return values/properties.

Answer 4

If you follow the Angular approach, you would format the data after receiving it. For instance, if the value is a string, replace it with an array containing that value. By doing this, your template will consistently receive results, and your controller logic will manage data structures consistently.

Update: I suggest not directly binding the raw data returned from the server to the $scope. It's beneficial to introduce a level of separation between server data names/types and client data to facilitate future changes without strong coupling.

JavaScript:

$http.get('/my/data').success(function(data) {
  // Data transformation and binding would be done here
  if(angular.isArray(data.EMAIL_ADDRESS)) {
    $scope.emailAddresses = data.EMAIL_ADDRESS;
  else {
    $scope.emailAddresses = [data.EMAIL_ADDRESS];
  }
});

HTML:

<span ng-repeat="emailAddress in emailAddresses">

This approach ensures that your templates are not tightly bound to server API return values/properties.

Answer 5

Answer №3

You have the option to display different cases using separate spans or documents: utilize ngRepeat for arrays and do not use it for simple strings.

It can be structured like this:

<div ng-show="isString(data.EMAIL_ADDRESS)">{{data.EMAIL_ADDRESS}}</div><div ng-hide="isString(data.EMAIL_ADDRESS)" ng-repeat="address in data.EMAIL_ADDRESS">{{address}}</div>

Answer 6

You have the option to display different cases using separate spans or documents: utilize ngRepeat for arrays and do not use it for simple strings.

It can be structured like this:

<div ng-show="isString(data.EMAIL_ADDRESS)">{{data.EMAIL_ADDRESS}}</div><div ng-hide="isString(data.EMAIL_ADDRESS)" ng-repeat="address in data.EMAIL_ADDRESS">{{address}}</div>

Answer 7

Answer №4

As you retrieve data from the server:

EMAIL_ADDRESS = Array.isArray(EMAIL_ADDRESS) ? EMAIL_ADDRESS : [EMAIL_ADDRESS]

Answer 8

As you retrieve data from the server:

EMAIL_ADDRESS = Array.isArray(EMAIL_ADDRESS) ? EMAIL_ADDRESS : [EMAIL_ADDRESS]

Splitting a string in Angular.JS using ng-repeat

Answer №1

Answer №2

Answer №3

Answer №4

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