All About Singleton – Important and Interesting pattern in Java Edit this problem on GitHub   Introduction Briefly, Singleton pattern is to ensure a class to have exactly one instance

How to tell if two linked lists intersect V.S. How to detect linked list cycle I am really excited to bring this, it’s gonna be fun, hope you enjoy. Edit

Leetcode 150: Evaluate Reverse Polish Notation Edit Evaluate Reverse Polish Notation on GitHub First you should know the definition of Reverse Polish Notation, it is quite interesting, postfix, stack-based, 😀

Leetcode 7 Reverse Integer and 8 String to Integer (atoi) This two problem share lots of similarities in data manipulating and thinking, and simplicity (:-D). Thus I decide to put

AngularJS two-way data-binding on jQuery Select2  Edit this page on GitHub As we all know, the <select> and <option> tag can provide dropdown for selecting. However, no one would call