Blog Posts

Check if String EndsWith in Python

May 30, 2021

The challenge Complete the solution so that it returns true if the first argument(string) passed in ends with the 2nd argument (also a string).


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How to add a Git Submodule to an existing codebase

May 29, 2021

Git submodules are a way of including another repository’s code into an existing codebase, without associating it’s code or tracking history in the parent repository.


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How to LowerCase a String in Python

May 28, 2021

Python comes with a built-in method on all String types, by calling lower() on a String, you can immediately lower the case of that String.


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How to Restart Sound Driver on a Mac

May 27, 2021

So for some strange reason, your audio has stopped playing through the Macbook Pro speakers, but if you plug in an external audio device, it still works?


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Number to Binary Conversion in Python

May 26, 2021

If you have a decimal number, and want to get it’s binary value, you can use the built-in bin method.


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Counting Binary Gaps with Python

May 25, 2021

The challenge A binary gap within a positive integer N is any maximal sequence of consecutive zeros that is surrounded by ones at both ends in the binary representation of N.


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How to Delete a Secret in Kubernetes

May 24, 2021

Once you have a secret in Kubernetes, if you know it’s name, you can delete it.


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How to Decode a Secret in Kubernetes

May 23, 2021

Secrets in Kubernetes are encoded using base64. If you have the secret name, you can ask for its value.


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How to Verify a Secret in Kubernetes

May 22, 2021

You have created a secret, and would like to retrieve it.


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How to Create a Secret in Kubernetes

May 21, 2021

Secrets allow applications to not hardcode usernames, passwords or additional information such as hostnames, IP addresses or other protected/sensitive information.


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How to Divide an Array into Chunks in PHP

May 20, 2021

If you have a single-dimensional array, and want to break it into chunks, you can use the array_chunks method.


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How to setup Certbot wildcard certificate on Apache

May 19, 2021

Certbot allows simple, quick and free provisioning of SSL certificates using LetsEncrypt.


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How to retrieve a Secret from AWS Secrets Manager in the CLI

May 18, 2021

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.


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Determine the Last Digits of N^2 == N in Java

May 17, 2021

The challenge Let’s call an integer number N ‘green’ if N² ends with all of the digits of N.


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How to Expose your App through a Service in Kubernetes

May 16, 2021

Once you have deployed an application into Kubernetes , it will not be available to the outside world.


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How to connect to Bash on a Kubernetes pod

May 15, 2021

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 functionality available from kubectl itself.


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How to get the Environment variables in a Kubernetes Pod

May 14, 2021

In this comprehensive guide, you will learn how to effectively get and list environment variables within a Kubernetes pod .


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How to find out Cluster Info in Kubernetes

May 13, 2021

In Kubernetes, a cluster is a group of machines working together.


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How to set and use a kubeconfig in Kubernetes

May 12, 2021

The kubeconfig file is the main configuration file that allows access to a Kubernetes cluster.


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How to Map over a List of Lists in Java

May 11, 2021

The challenge Write a function which maps a function over the lists in a list:


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