How to acheive this?

Ionic Framework ionic-v3
1

I have such code.

Array.forEach(item=>{
call Httprequest().then(result=>{
update var;
…
});
});

my question is how to sync var’s value before update. thanks.

2

Look into the rxjs forkJoin operator.

3

thanks a lot, forkJoin can be used for my purpose.