javascript - Async Observable method inside of a map method -


what's best approach transform array , call few observable methods inside.

what looking of type work:

   resultarray = somearray.map(item => {       oneobs.subscribe(result1 => {            item.result1 = result1       });       secondobs.subscribe(result2 => {            item.result2 = result2       });    });

what best approach here? came workaround use foreach loop of kind:

   somearray.foreach(item => {       observable.forkjoin([oneobs, secondobs]).subscribe(         (results: [result1type, result2type]) => {            item.result1 = results[0];            item.result2 = results[1];            resultarray.push(item);        });     });

any appreciated.

your trying mix synchronous , asynchronous code, might lead weird behavior. recommendation convert array observable (making array asynchronous) getting results , converting completed result array again:

observable.from(somearray) // 1     .mergemap(item => observable.forkjoin(oneobs, twoobs)             .map(results => {                 item.result1 = results[0];                 item.result2 = results[1];                 return item;             }))     .toarray() // 2     .subscribe(arr => resultarray = arr);
  1. create observable based on array
  2. wait observables finish , create array resulting values

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