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Apache Tomcat – How To Set Up Environment Variables

1. Overview In this tutorial, we’re going to see to how set up environment variables for applications deployed in Apache Tomcat. 1. Set up Environment Variables For Apache Tomcat On Windows One popular approach to set up environment variables for… Continue Reading →

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Create A Data Frame In R

This tutorial is going to cover how to create a data frame in R. We’re going to get through how to: Creating data frames from Vectors. Creating data frames from existing data frames. Creating data frame a List. 1. What… Continue Reading →

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Java – Lookup a Java Enum From Its String Value

This tutorial is going to cover how to lookup a Java enum from its string value. 1. Simple Enum Type Let’s assume that we have a simple enum as follows: To lookup a Java enum from its string value, we… Continue Reading →

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JUnit 5 and Mockito Example

In this short tutorial, we’re going to explore how to use JUnit 5 and Mockito, a popular mocking framework for unit tests written in Java. 1. JUnit 5 and Mockito Dependencies 1.1. Maven Dependencies At first, let’s take a look… Continue Reading →

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Remove Or Delete A Column Of A Data Frame In R

In this tutorial, we’re going to show how to remove or delete a column of a data frame in R. 1. Preparation Let’s create a data frame which will be used for all examples in this tutorial:

And let’s… Continue Reading →

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How To Sort Or Order A Data Frame In R

This tutorial is going to illustrate how to sort or order a data frame in R. 1. Preparation Let’s assume that we have a small data frame about books as follows, which will be used for all examples in this… Continue Reading →

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Spring Boot – How To Set Active Profiles

In this tutorial, we’re going to show how to set active profiles for Spring Boot applications. This is useful for us during application development and deployment. 1. Set Active Spring Profiles In The application.properties File We can set active profiles… Continue Reading →

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