Bubble sort algorithm is comparison based algorithm in which each pair of adjacent elements is compared and elements are swapped if they are not in order. The average and worst case complexity of bubble sort is O(n²) where n is the number of items.

Selenium webdriver explicit wait and implicit wait.

How to display timestamp in desired format in python.

Java abstract class and interface and their difference.

Extract the i-th digit of any integers, where i starts from right to left.

Introduction to html div and span elements and their differences.

Python source code encoding and unicode in 2.x.

Three kinds of css placement in HTML.

What the if __name__ == '__main__'does in python and practice of defining python main functions.

Python function standard arguments, positional arguments, and keyword arguments.