Loop through JSON results in Ionic using Angular

I am struggling to retrieve data from a JSON file in Object format using Typescript. When I try to fetch the data from the API, it doesn't display as expected.

Typescript

this.http.get('http://example.com/api')
  .subscribe((data) => {
    console.log(data);
  });

The structure of the API JSON file is as follows:

{
  1: {id:1, name: "string"}
  2: {id:1, name: "string"}
  3: {id:1, name: "string"}
  4: {id:1, name: "string"}
}

I need help with looping through this data later on.

<ion-item *ngFor="let item of data" >
  <div>
    {{item.name}}
  </div>
</ion-item>

Any assistance would be greatly appreciated.

I found a solution to my issue:

<ion-item *ngFor="let item of data | keyvalue" >
  <div>
    {{ item.key }} {{ item.value['data'] }}
  </div>
</ion-item>

Answer №1

There are various ways to iterate through this response object:

  1. utilize the keyvalue pipe from angular: *ngFor item of data | keyvalue
  2. transform it into an array using Object.values(data) or Object.entries(data). The former provides only the value object, while the latter includes both the values and the "numbers"

It is important to note that the order of the returned object is not defined. Therefore, if you choose either method, the sequence of iteration may be unpredictable and could be random.

While it might work correctly on your specific device/browser, it is unwise to depend on it. It's advisable to sort your data post-conversion to an array if ordering is essential.

If the order is determined by the numeric keys in the original object, using Object.entries would be a suitable approach as it produces an array of key-value pairs

[[1, {id:1, name: "string"}], [...], ...]

You can then easily arrange them based on the first element of each pair.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

What do I do when I encounter the error message "Provider not found for RadioControlRegistry" in Angular 2? Which provider should

Which provider should be included in the provider component? <div class="radio"> <input let match id="male" type="radio" name="gender" value="true" [(ngModel)]="isMatching" (click)="isMatching(match.value)" > Take a look at my console output ...

How do I modify the background of a TextButton in LibGDX?

Searching for a way to modify the background of a TextButton in LibGDX. Here's an excerpt from my JSON Skin configuration: com.badlogic.gdx.scenes.scene2d.ui.TextButton$TextButtonStyle: { default: {down: btnNormal, up: btnNormal, font: brokende ...

Working with Yarn and Webpack: Incorporating a TypeScript .ts file from an external Node directory not controlled by Yarn/Webpack

I am currently working on a k6 project for load testing, utilizing Yarn and Webpack. This project is stored within a sub-folder of a larger repository that primarily uses npm Node modules. My goal is to access a secret from AWS's Secrets Manager in t ...

Receiving warnings during npm installation and encountering difficulties with fixing issues using npm audit fix

Currently, I am working on developing an Angular application with a .NET Core Web API integration. Upon cloning the repository, I attempted to execute 'npm install' for the Angular application, but encountered an unexpected error: npm install n ...

An exploration of navigating through a generic interface in Angular

I've recently started exploring Angular and I'm trying to incorporate a generic interface to reuse pagination models from different sources. Let me share some code examples to clarify. export interface IUser{ id: string; name: string; email: stri ...

When using the imported function, a TypeError occurs: "... is not recognized as a valid function."

I often use a function across multiple files, and it works perfectly like this: import moment from 'moment'; let monthAsString = (month: number): string => { return moment().locale('de').month(month - 1).format("MMMM"); } config ...

Is there an issue with the JSON data?

"stocksdata" :[{"id":7,"SCRIP":"ASIANPAINT","LTP":3341,"OHL":"BUY","ORB15":"BREAKOUT","ORB30":"NT","PRB":"NA","CAMARILLA& ...

Step-by-step guide on implementing virtual scroll feature with ngFor Directive in Ionic 2

I am working on a project where I need to repeat a card multiple times using ngFor. Since the number of cards will vary each time the page loads, I want to use virtual scrolling to handle any potential overflow. However, I have been struggling to get it ...

Sometimes, Express may return the message "not found" on and off

After working with express for many years, I find myself a bit out of practice with TypeScript - and it seems like my eyesight is failing me! This is the first time I've encountered this issue, so I must be missing something... My current dilemma is ...

Issues with serving JSON file on Jekyll Github pages

My LeafletJS map is utilizing a JSON file to generate markers. Everything works fine when I run jekyll serve on my local machine, but the Github Pages version of the site is throwing a 404 error when trying to load the JSON. Can anyone shed light on why ...

An alternative to the JsonConstructor attribute in Json.Net for System.Text.Json

Json.Net provides the JsonConstructor attribute to direct the deserializer to use a specific constructor for object creation. Are there any equivalent features available in System.Text.Json? ...

Disabling an Angular MSal route guard based on the environment variable's condition

My routing module is set up with MsalGuard to require authentication for child routes. While this works, I want to disable MsalGuard based on an environment variable when testing locally. How can I achieve this? I attempted using canDeactivate on my rout ...

What is the best way to search for specific data in a MongoDB database?

When using angular2 in conjunction with meteor, the data contains the following information: { "_id" : "DxEraKtfYavoukdCK", "name" : "Aaron", "capacity" : 20, "available_capacity" : 15, "location" : "1" } { "_id" : "yMhEggaGmS7iio9P4", "name" : "Benard ...

Converting CSDL format into JSON data structure

Is there a way to convert data retrieved in CSDL format from an Oracle DB into JSON format using NODE JS? export async function getRecepFarma(req: Request, res: Response): Promise<Response> { const conn = await connect(); const result = await ...

Is now the ideal moment to implement Angular 4?

When considering using Angular 4 for an enterprise SAP system, is it better to stick with Angular 2 and wait for the final release of Angular 4? There have been rapid releases of Angular 4 that may affect our decision. (View changelog) Your suggestions ar ...

Showcasing an Angular Material Dialog following a delay of x seconds

I'm currently working on integrating an Angular Material Dialog and I would like it to appear x seconds after the user clicks the openDialog button. Is this achievable? ...

NextJS 13 causes tailwind to malfunction when route group is utilized

I've encountered an issue in my NextJS 13 application where Tailwind classes are no longer being applied after moving page.tsx/layout.tsx from the root directory to a (main) directory within the root. I suspect that there may be a configuration that i ...

What are some techniques for streamlining this code with Typescript?

I am currently working with the following code snippet: let doNavigate = this.currentScreen === removedFqn; if (doNavigate) { location.reload(); } Does anyone have any suggestions on how I can simplify this code using Typescript? ...

The importation of TypeScript source modules is not compiled accurately in the distribution folder

Currently, I am working on a REST API in TypeScript with the following structure: ├── dist │ ├── index.js │ ├── library.js ├── src │ ├── index.ts │ ├── library.ts ├── node_modules ├── package. ...

Is it possible for the Observable call in Angular 4 to function similarly to jQuery's synchronous AJAX method?

As I have a business logic function that needs to use HttpGet and I must wait for the result before continuing, jQuery's ajax can handle this easily. But I am curious if Observables have a similar feature? I was hoping for the result to be: John An ...