nodejs starting a new call stack

Question

nodejs starting a new call stack

I have the following problem:

I have an array with functions, that I need to call one after the other:

fun[0]() then fun[1]() ...

Since these functions make asynchronous calls, I can't just write

fun[0]();
fun[1]();

Therefore I addded at the 'end' of each function in the array a call to the next function.

This actually works, but this results in growing the stack. Example:

function fun0(){
   fun[1](); // now fun[1] is added to the stack
}

Is there a way to avoid this problem? I don't need the local variables of the other functions.

javascript
node.js

Answer 1

Yes there is a way around.

You can use the async.js https://github.com/caolan/async

Install it using npm install async

Then if you want to execute functions one after the another, there is a method,

async.series([
    function(callback){
        // do some stuff ...
        callback(null, 'one');
    },
    function(callback){
        // do some more stuff ...
        callback(null, 'two');
    }
],
// optional callback
function(err, results){
    // results is now equal to ['one', 'two']
});

The second function only executes when the first one has issued the callback. Hence this makes sure all functions inside the async.series execute one after the another.

Answer 2

You can use

process.nextTick()

or

setInverval()

to achieve this