What is the difference between .map, .every, and .forEach?

Question

I\'ve always wondered what the difference between them were. They all seem to do the same thing...

Answer 1

Another consideration to the above great answers is chaining. With forEach() you can't chain, but with map(), you can.

For example:

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

arrayNumbers.map(function(i) {
    return i * 2
}).sort();

with .forEach(), you can't do the .sort(), you'll get an error.