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Basic tutorials in Java, iOS, Ruby & Javascript

This blog contains simple and easy to understand tutorials in Swift, Obj C, Java, Javascript and Ruby. Tutorials explains core concepts by breaking down problems to the simplest form of the idea. The thorough understanding of this then provides the basis on which more complex concepts are introduced and explained. The understanding is further reinforced by providing code samples via my github repo.

Preparing for App Academy Coding Exercise

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June 10, 2017

Check out my code on Repl.it: https://t.co/inbxc1pywI
— Ofili Valentine (@valofils) June 10, 2017

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Java 8 features

June 08, 2017

1. Adding Foreach () method in iterables 2. Default and static methods in interfaces 3. Functional Interfaces & Lambda Expressions 4. Java Stream API for bulk data operations on collections 5. Java Time API 6. Collection API Improvements 7. Concurrency API Improvements 8. Java I/O Improvements

Method Swizzling - Objective C hackery

April 16, 2017

This is a new concept to me and it's quite arguably a feature that could haunt you the more your iOS app gets more complex. Objective C Method Swizzling is the process of changing the reference your method selector points to at runtime. It is made possible by Objective C's dispatch model. So let's say a method has a reference f(). In method swizzling you can point the method f() to another method at runtime. A simple example Lets say we wish to print a log statement whenever viewDidAppear() is called on a UIViewController. One solution could be to subclass UIViewController with a LoggingViewController and use that as our new base class for view controllers.