How to find index of object in a array from JSON - Angular 2

Question

How i can find index of object in an array from JSON in a component?

My JSON file looks like this,

{
 "Projects":[
  {
    "id":"proj-1",
    "name":"Design for creative",
    "meta":{
        "date":"03 November, 2016",
        "url":"http://www.pixelsocket.com",
    },
    {
    "id":"proj-2",
    "name":"Design for creative",
    "meta":{
        "date":"03 November, 2016",
        "url":"http://www.pixelsocket.com",
    }
    ...
}

Here is my project detail component

export class ProjectDetailComponent implements OnInit{

project: Project;

projectId: string;

totalProjects: Project[] = [];

currentProjectIndex:number;


constructor(private dataService: DataService, private route:   ActivatedRoute) {
  this.projectId = route.snapshot.params['id'];
}

ngOnInit() {
  //Getting Projects Data
  this.dataService.getProjects().then(
    (data: any) =>  this.totalProjects = data
  );

  this.route.params
  .switchMap((params: Params) =>    this.dataService.getProject(this.projectId))
  .subscribe(data => this.project = data);
 }
}

Now i want to somehow get current index of object.

Possible duplicate of [indexOf method in an object array?](http://stackoverflow.com/questions/8668174/indexof-method-in-an-object-array) — Christopher Moore, Feb 08 '17 at 14:04

score 2 · Accepted Answer · answered Feb 08 '17 at 14:05

2

The Array.prototype.findIndex() method returns an index of the first element in the array that satisfies the provided testing function.

function isBigEnough(element) {
  return element >= 15;
}

[12, 5, 8, 130, 44].findIndex(isBigEnough); // 3

answered Feb 08 '17 at 14:05

Jérémie L

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How to find index of object in a array from JSON - Angular 2

1 Answers1