How to convert a PascalCase string into snake_case in Python
The challenge
Complete the function/method so that it takes a PascalCase string and returns the string in snake_case notation. Lowercase characters …
Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to Convert a Hex String to RGB in Python
The challenge
When working with color values it can sometimes be useful to extract the individual red, green, and blue (RGB) component values for a …
Read Article →How to Create a Hashtag Generator in Python
The challenge
Write a hashtag generator function that takes a string and returns a #HashCodeString of it.
The hashtag generator should perform the …
Read Article →How to Move Zeros to the End in Python
The challenge
Write an algorithm that takes an array and moves all of the zeros to the end, preserving the order of the other elements.
move_zeros([1, …Regex for Gregorian Date Validation in Python
The challenge
Write a regular expression that validates the gregorian date in the format “DD.MM.YYYY”
Correct date examples: …
Read Article →How to Create Your Own Python Split Function
The challenge
Write your own implementation of the built-in split function in Python.
The following rules must be adhered to:
- the function cannot …
How to create a Domain Name Validator in Python
The challenge
Create a domain name validator mostly compliant with RFC 1035, RFC 1123, and RFC 2181
The following rules apply:
- Domain name may …
How to start Java Jar as Service on Linux
If you have a Java Jar file, you can run it as a service under Linux/Ubuntu.
sudo ln -s /var/www/japi-0.0.1-SNAPSHOT.jar /etc/init.d/japi
Now you can …
Read Article →How to write a validDate Regex in Python
The challenge
Your task is to write a regular expression (regex) that will match a string only if it contains at least one valid date, in the format …
Read Article →How to Validate Passwords with Regex in Python
The challenge
You need to write regex that will validate a password to make sure it meets the following criteria:
- At least six characters long …
How to create a Coordinates Validator in Golang
The challenge
You need to create a function that will validate if given parameters are valid geographical coordinates.
Valid coordinates look like the …
Read Article →How to Validate ISBN-10 numbers in Golang
The challenge
ISBN-10 identifiers are ten digits long. The first nine characters are digits 0-9. The last digit can be 0-9 or X, to indicate a value …