How to I get the index of a subscribed object in Angular component file?

Question

this.arrName.subscribe(data, (index as i) => { //fake implementation
    let myData = data.inside[i].keyName;
}); 

I want to implement something like this.

Answer 1

you can do it like this

this.arrName.subscribe(data => {
   for(let i in data.inside){
    let myData = data.inside[i].keyName;
  }
});

but you need data as

{ 
 inside : [
             {keyName: ...}
          ]
}

as data.inside[i] access ith index of data.inside, or if you have data as array use data[i]