How to read data from a file in Java
Suppose we have a data file containing two columns of tab-delimited integers as follows: 2 3 4 6 6 9 ... The following example fetches data from this file and…
Java: Converting String to List
There are many other reasons for wanting to convert a String to a List. For example, the length of the String needs to be defined. Such a restriction does not…
Python code for Trigonometry Calculator
Trigonometry is an important branch of mathematics that deals with the study of relationships between the sides and angles of triangles. It finds applications in various fields, such as physics,…
Solving Quadratic Equations with Python
Quadratic equations are a type of polynomial equation that have been studied for centuries. They have applications in various fields such as physics, engineering, and economics. A quadratic equation is…
Misunderstanding isset() behavior in PHP
The isset() function in PHP is often misunderstood, leading to errors and unintended outcomes in code. In this article, we will delve deeper into the workings of isset() and show…
How to avoid leaving dangling array references after foreach loops in PHP
In PHP, when using a foreach loop to iterate over an array, you may sometimes accidentally create a “dangling array reference” after the loop has been completed. This occurs when…
Object-Oriented Python
Python is a fully object-oriented programming language but it can also be used for scripting. It is assumed that you are already familiar with object-orientation concepts and have experience writing…
Python Error Handling
In Python, you can handle errors with exceptions. The following code will generate an FileNotFound error because the file it is trying to open does not exist: output An error…
Python Regular Expressions
Python uses re library for regular expressions. re comes with standard python installation. Regular expressions is a very big topic. This page only covers the basics of how to search…
Python Unit Testing Example
Unit testing functionality is built into Python3. Following is a very simple example: Save this file as mycode.py. Save the following code as mycode_unittest.py When you run the unit test…