Get Request and Return Value in a Function

Question

For some reason, "p" returns as undefined. How would I make it return the array?

function doT() {
    var pe;
    $.get("https://www.google.com", function(data) { 
    pe = ["a", "b", "c"]; 
    });
    return pe;
}

var p = doT();
setTimeout(function() { console.log(p.length); }, 1200);

Now it does. I only put the setTimeout just in case the get request wasn't finished yet and it was returning the blank pe. — Jamal Balcsd, May 22 '16 at 04:08
Possible duplicate of [How do I return the response from an asynchronous call?](http://stackoverflow.com/questions/14220321/how-do-i-return-the-response-from-an-asynchronous-call) — Alexei Levenkov, May 22 '16 at 04:10
I agree @AlexeiLevenkov Do you know how to fix it though? I'm not really following the responses too well. — Jamal Balcsd, May 22 '16 at 04:14

score 2 · Accepted Answer · answered May 22 '16 at 04:32

One of the ways will be to use promise (read about it):

Right now it goes to the reject block because of CORS (read about it):

var promise = new Promise(function(resolve, reject) {
  var pe;
  $.ajax("https://www.google.com")
    .done(function() {
      pe = ["a", "b", "c"];
      resolve(pe);
    })
    .fail(function() {
      reject("error");
    });
});
promise.then(function(result) {
  $("#testing").text(result);
}, function(err) {
  $("#testing").text(err);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="testing"></div>

Just make a valid ajax call and it will work. Comment if need further explanation.

score 0 · Answer 2 · edited May 23 '16 at 03:10

0

function doT() {

  var pe = $.get("https://www.google.com", function(data) { 
    pe = ["a", "b", "c"]; 
  });

 return pe;
}

alert(doT());

edited May 23 '16 at 03:10

br3nt

9,017
3
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answered May 22 '16 at 04:27

Valerie Trotter

26
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Did you test this? – digglemister May 22 '16 at 04:34
Generally, answers are much more helpful if they include an explanation of what the code is intended to do, and why that solves the problem without introducing others – Bhavesh Odedra May 22 '16 at 08:08

Get Request and Return Value in a Function

2 Answers2