Function pointers and callbacks

Web Reference: A function of that nature can be called at any time, anywhere. jQuery (a library built on Javascript) has built in functions that generally required the DOM to be fully rendered before being called. What these functions do is that when the function is defined, The function is immediately called, which saves time and extra lines of code (as compared to calling it on a seperate line). Mar 15, 2023 · (function(){})(); Lastly, ! makes the expression return a boolean based on the return value of the function. Usually, an immediately invoked function expression (IIFE) doesn’t explicitly return anything, so its return value will be undefined, which leaves us with !undefined which is true. This boolean isn’t used.

YouTube Excerpt: See complete series on pointers here http://www.youtube.com/playlist?list=... In this lesson, we have explained use cases of function pointer through code examples. In previous video, we had explained basics of function pointers. See Bubble sort video here: http://www.youtube.com/watch?v=Jdtq5uKz-w4&list=PL2_aWCzGMAwKedT2KfDMB9YA5DgASZb3U&index=3 About event handling - You can think of a scenario where if something happens in a user interface, you want to perform some action. For example, upon a mouse click, you want to call some function. Many libraries give you a design where you can register a callback function to be called upon an event (like a mouse click). Library function will callback this function that you would register whenever the event occurs. Basically library function will call all functions registered for the event (stored in some list). See this Wikipedia article to know about events: http://en.wikipedia.org/wiki/Event_(computing) For practice problems and more, visit: http://www.mycodeschool.com Like us on Facebook: https://www.facebook.com/MyCodeSchool Follow us on twitter: https://twitter.com/mycodeschool

See complete series on pointers here http://www.youtube.com/playlist?list=... In this lesson, we have explained use cases of function pointer...

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