angular - How to read Angular2 json map object in angular2 -

i trying fetch json object in angular 2 has key value pair.

your question not clear. demonstrate things understood question.

here's sample code (assuming value pair username & password)

  let params:urlsearchparams = new urlsearchparams();         params.set('username', username);         params.set("password", password);   return this.http.post(this.baseurl + '/auth/credential', '', {search: params}).map((res:response) => res.json()); 

i defined above method getuserdetails() global service , import dataservice particular component mentioned below,assuming server send reply inside array called results(cant out looking @ back-end implementation of project)

 this.dataservice.getuserdetails().subscribe(             (data) => {                 console.log('fetched userdata edit', data.results)                 this.modify_users = data.results;                 console.log(data.results);                 console.log(this.modify_users);             },             (error) => {                 console.log('failure viewuserdetails');                 alert('error getting user details edit');             }); 

so if describe on i'm doing here is,

(data) =>{}: define next when receive kind of data server.
(error)=>{}: define next when server replied withan error