I'm new to JavaScript. And I'm now using w3schools.com as my major resource of references of the language (including HTML and CSS).
What I just found is that the map() method of Array object is not listed on the site, check the reference page here . After some research, I found that this method is defined in ECMAScript 5 and it's already widely supported on the modern browsers.
But why it's not listed on w3schools.com. Is there a good reason not using that? Or it just shows the incompleteness of w3schools.com and I should not using that for study?