.map()

Pass each element in the current matched set through a function, producing a new jQuery object containing the return values.

Ajax Events

Ajax requests produce a number of different events that you can subscribe to. Here's a full list of the events and in what order they are triggered. There are two types of events: Local Events These are callbacks that you can subscribe to within the Ajax request object, like so: 1 2 3 4 5 … Continue reading

.is()

Check the current matched set of elements against a selector, element, or jQuery object and return true if at least one of these elements matches the given arguments.