Push Functions into an Array - Loop through and Splice?

Question

Using Javascript i need to be able to:

1: Push a certain amount of the same function (with a different parameter in each) into an array.

2: Then run each functio

Answer 1

First of all you are not pushing functions into the array at the moment, you execute the func instead. To achieve the push your func should look like this:

// Function for array objects - alert passed parameter
function func(num){
  return function(){
    alert(num);
  }
}

Now if your functions are synchronous you could simply iterate over the array

for(var i in arr){
  arr[i]();
}
console.log('done');

If we are dealing with asynchronous functions then they need to have a callback:

// Function for array objects - alert passed parameter
function func(num){
  return function(callback){
    alert(num);
    callback();
  }
}

And then you can either use a counter to run in parallel.

var count = arr.length;
for(var i in arr){
  arr[i](function(){
    if(--count === 0){
      console.log('Done');
    }
  });
}

Or in sequence:

function run(){
  var fn = arr.shift();
  if(!fn){
    console.log('Done');
  } else {
    fn(run);
  }
}
run();