Assign a variable's value to what's returned from a JS function

Question

I have a function that returns an object, like this:

function getJSON(url) {
    request.get({
        url: url,
        json: true,
        headers: { 'User-Agent': 'request' }
    }, (err, res, response) => {
        if (err) {
            console.log('Error:', err);
        } else if (res.statusCode !== 200) {
            console.log('Status:', res.statusCode);
        } else {
            // JSON received successfully
            return response;
        }
    });
}

The function is working fine, but when I declare a variable to use what the function returns, it is undefined instead. I expect it to be an object.

var someVar = someFunction('url-to-the-json');

By chance, Does the function do something asynchronous like call an api? — ktilcu, May 14 '17 at 06:46
What is `anObject`? Does `// do something here` possibly contain a `return` statement with no value? — , May 14 '17 at 06:55
Minimal examples are fine, preferred in fact… but this is a bit *too* minimalistic. — deceze, May 14 '17 at 06:58
You are doing it the right way but you may be doing async operations (like an ajax request) in your function causing it to reach `return` before the end of your requests or you may have context problems. — Raphaël, May 14 '17 at 07:01
Top linked question in the [tag:javascript] tag… http://stackoverflow.com/q/14220321/476 — deceze, May 14 '17 at 07:06

score -1 · Answer 1 · answered May 14 '17 at 06:47

-1

Try assign function to variable:

var myVar = function someFunction() {
    //do something here
};
//then use myVar
function newFunction(myVar){
  //do something
 }

answered May 14 '17 at 06:47

Oleg Markoff

321
2
7

I'm puzzled by this. You are passing a function to a function? What does this have to do with the OP's question? What do you think accounts for the problem he is reporting? – May 14 '17 at 06:56

Assign a variable's value to what's returned from a JS function

1 Answers1