How to Divide an Array into Chunks in PHP
If you have a single-dimensional array, and want to break it into chunks, you can use the array_chunks method.
It takes 3 arguments:
- The input array …
Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to setup Certbot wildcard certificate on Apache
Certbot allows simple, quick and free provisioning of SSL certificates using LetsEncrypt.
How to install Certbot
Option 1 (recommended)
sudo snap …How to retrieve a Secret from AWS Secrets Manager in the CLI
If you have stored a secret in AWS using the Secrets Manager, it is possible to use the AWS CLI to retrieve this value at a later date.
aws …
Determine the Last Digits of N^2 == N in Java
The challenge
Let’s call an integer number N ‘green’ if N² ends with all of the digits of N. Some examples:
5 is green, because 5² = 25 …
How to Expose your App through a Service in Kubernetes
Once you have deployed an application into Kubernetes, it will not be available to the outside world.
For this to be possible, you need to expose it …
Read Article →How to connect to Bash on a Kubernetes pod
If you find yourself needing to jump into a Kubernetes pod to either diagnose an issue, or run a particular command, you can use the bash connectivity …
How to get the Environment variables in a Kubernetes Pod
In this comprehensive guide, you will learn how to effectively get and list environment variables within a Kubernetes pod. Understanding how to work …
Read Article →How to find out Cluster Info in Kubernetes
In Kubernetes, a cluster is a group of machines working together.
By running the kubectl cluster-info command, we can find out high level information …
How to set and use a kubeconfig in Kubernetes
The kubeconfig file is the main configuration file that allows access to a Kubernetes cluster.
When you first create your Kubernetes cluster, you are …
Read Article →How to Map over a List of Lists in Java
The challenge
Write a function which maps a function over the lists in a list:
public static <T,R> R[][] gridMap(Function<T,R> fn, T[][] …How to Differentiate a Polynomial in Java
The challenge
Create a function that differentiates a polynomial for a given value of x.
Your function will receive 2 arguments: a polynomial as a …
Read Article →Find the Sums of Perfect Squares in Java
The challenge
The task is simply stated. Given an integer n (3 < n < 10<sup>9</sup>), find the length of the smallest list of …