Promote a list of elements in an array

I cannot find examples showing how you are going to use promises with a list (array, in this case or others ...). For example, I have a list:

var list = [1, 2, 3, 4, 5];

      

        
        
        
      

    

And I would like to perform the operation, and once they are fully (resolved), pass the results to another function. I am using a lazy approach, but is there a cleaner solution?

Promise
    .map(result, function(number) {
        var defer = Promise.pending();

        setTimeout(function() {
            return defer.resolve(number * 2);
        }, 2000);

        return defer.promise;
    })
    .then(function(result) {
        console.log(result);
    });

      

        
        
        
      

    

Thanks in advance for your help.