asynchronous - TypeScript/Angular 2 - call a function after another completes -


i have 2 functions call, want call second 1 after first 1 completes. how go doing that?

first function:

getdirectorysubfolders(node: any) {     console.log('home:getdirectorysubfolders() entered...');      this._sdiservice.getdirectoriesatpath("desktop")         .subscribe(res => {             this.nodechildren = res;         }); }

second function:

getchildren(node: any) {    console.log('home:getchildren entered..');    return new promise((resolve, reject) =>    {        settimeout(() => resolve(this.nodechildren.map((c) =>        {            return object.assign({}, c, {});        })), 1000);    }); }

there 2 simple ways call second function after first 1 finished - can under this.nodechildren = res; or use finish parameter ():

getdirectorysubfolders(node: any) {     console.log('home:getdirectorysubfolders() entered...');      this._sdiservice.getdirectoriesatpath("desktop")         .subscribe(res => {             this.nodechildren = res;             this.getchildren(); <-- here         },         () => {             this.getchildren(); <-- or here         }); }

when call getdirectorysubfolders() function, getchildren() called after completion of getdirectorysubfolders().


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