在Node Js中依次使用不同的参数多次运行一个函数

Question

I have an array with values and I want to run a single function with a callback with each of the array's values as an argument sequentially. Meaning, run the function with the first cell's value, when it finishes run the function with the second's cell value etc. I tried with Q and I can't seem to find a way to do it with arguments, it keeps calling the function.

Example:

var array = [1,2,3,4,5]

var func1 = function(num){
  setTimeout(function(){
    console.log(num+num);
  }, 3000);
}

I want to run the function with 1 as argument, when it finishes run with 2 as argument etc

Please notice that I want to run it sequentially.

Thanks!

Answer 1

Use array.map

var array = [1,2,3,4,5]

var func1 = function(num){
  console.log(num+num);
}
array.map(func1)

Answer 2

Simply use a forEach

var array = [1,2,3,4,5]
var func1 = function(num){
  console.log(num+num);
}
array.forEach(func1);

And with Promise somethig like (not working code, just giving ideas) :

var array = [1,2,3,4,5]
var func1 = function(num){
     var p = new Deferred();
     setTimeout(function(){
         console.log(num+num);
         p.resolve(num+num)
     }, 3000);
     return p;
}
var count = 0;
function next() {
    func1(array[count++]).then(next);
}