Return multiple values in JavaScript?

Question

I am trying to return two values in JavaScript. Is this possible?

var newCodes = function() {  
    var dCodes = fg.codecsCodes.rs;
    va         


        

Answer 1

All's correct. return logically processes from left to right and returns the last value.

function foo(){
    return 1,2,3;
}

>> foo()
>> 3

Answer 2

Ecmascript 6 includes "destructuring assignments" (as kangax mentioned) so in all browsers (not just Firefox) you'll be able to capture an array of values without having to make a named array or object for the sole purpose of capturing them.

//so to capture from this function
function myfunction()
{
 var n=0;var s=1;var w=2;var e=3;
 return [n,s,w,e];
}

//instead of having to make a named array or object like this
var IexistJusttoCapture = new Array();
IexistJusttoCapture = myfunction();
north=IexistJusttoCapture[0];
south=IexistJusttoCapture[1];
west=IexistJusttoCapture[2];
east=IexistJusttoCapture[3];

//you'll be able to just do this
[north, south, west, east] = myfunction(); 

You can try it out in Firefox already!

Answer 3

Few Days ago i had the similar requirement of getting multiple return values from a function that i created.

From many return values , i needed it to return only specific value for a given condition and then other return value corresponding to other condition.

---

Here is the Example of how i did that :

Function:

function myTodayDate(){
    var today = new Date();
    var day = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];
    var month = ["January","February","March","April","May","June","July","August","September","October","November","December"];
    var myTodayObj = 
    {
        myDate : today.getDate(),
        myDay : day[today.getDay()],
        myMonth : month[today.getMonth()],
        year : today.getFullYear()
    }
    return myTodayObj;
}

Getting Required return value from object returned by function :

var todayDate = myTodayDate().myDate;
var todayDay = myTodayDate().myDay;
var todayMonth = myTodayDate().myMonth;
var todayYear = myTodayDate().year;

The whole point of answering this question is to share this approach of getting Date in good format. Hope it helped you :)

Answer 4

I am nothing adding new here but another alternate way.

 var newCodes = function() {
     var dCodes = fg.codecsCodes.rs;
     var dCodes2 = fg.codecsCodes2.rs;
     let [...val] = [dCodes,dCodes2];
     return [...val];
 };

Answer 5

No, but you could return an array containing your values:

function getValues() {
    return [getFirstValue(), getSecondValue()];
}

Then you can access them like so:

var values = getValues();
var first = values[0];
var second = values[1];

With the latest ECMAScript 6 syntax*, you can also destructure the return value more intuitively:

const [first, second] = getValues();

If you want to put "labels" on each of the returned values (easier to maintain), you can return an object:

function getValues() {
    return {
        first: getFirstValue(),
        second: getSecondValue(),
    };
}

And to access them:

var values = getValues();
var first = values.first;
var second = values.second;

Or with ES6 syntax:

const {first, second} = getValues();

^{* See this table for browser compatibility. Basically, all modern browsers aside from IE support this syntax, but you can compile ES6 code down to IE-compatible JavaScript at build time with tools like Babel.}

Answer 6

It is possible to return a string with many values and variables using the template literals `${}`

like:

var newCodes = function() {  
    var dCodes = fg.codecsCodes.rs;
    var dCodes2 = fg.codecsCodes2.rs;
    return `${dCodes}, ${dCodes2}`;
};

It's short and simple.