How to Find the Max Tree Node Value in Java
The challenge
You are given a binary tree. Implement the method findMax which returns the maximal node value in the tree.
For example, the maximum in …
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In-depth guides, insights, and best practices for modern software engineering
How to String Search with a Wildcard in Java
The challenge
The method below is the most simple string search algorithm. It will find the first occurrence of a word in a text string.
haystack = …
How to get the AWS AccountID in Terraform
If you are automating AWS resources in Terraform, then you will want to not hardcode things as much as possible.
Terraform makes it possible to pull …
Read Article →Error creating AppStream Fleet – InvalidRoleException
If you get the following error when trying to run some Terraform:
error creating Appstream Fleet (): InvalidRoleException: AppStream 2.0 encountered …
How to Create AWS AppStream resources in Terraform
AWS AppStream has finally made its way into the Terraform AWS Provider.
If you are using hashicorp/aws version 3.67 or above, then you can do the …
How to Stop a Goroutine in Golang
It’s possible to stop a Goroutine by sending a value into it via a signal channel:
exit := make(chan bool)
go func() {
for {
select …How to Create an Empty Branch in Git
If you need to create an empty branch in git, you can follow one of the below options.
If you are using git version 2.27 or newer, then follow the …
Read Article →Get the Consonant Value in Java
The challenge
Given a lowercase string that has alphabetic characters only and no spaces, return the highest value of consonant substrings. Consonants …
Read Article →How to Check for Factor in Python
The challenge
This function should test if the factor is a factor of base.
Return true if it is a factor or false if it is not.
Factors are numbers …
Read Article →Understanding Bitwise Operators in Python
There are 6 binary/bitwise operators in Python:
- Complement/Not (
~) - And (
&) - Or (
|) - XOR (
^) - Left Shift (
<<) - Right Shift (
>>)
A …
Read Article →Word Values Challenge in Java
The challenge
Given a string "abc" and assuming that each letter in the string has a value equal to its position in the alphabet, our string …
How to update/upgrade all Homebrew packages
If you use Homebrew – and you probably should if you’re on a Mac – then you have probably installed various different applications and packages …
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