How to Write a Custom Comparator in Python
Generally, you want to use the built-in sorted() function which takes a custom comparator as its parameter. We need to pay attention to the fact that …
Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to delete an AWS WAF – Web ACL
Usually, it’s quite easy to delete an AWS WAF, or Web ACL. But sometimes you may come across the following error when attempting to delete the …
Read Article →How to Sort an Integer in Python
Let’s say that you have an integer with value of 9271 and you want to sort it either ascending(1279) or descending(9721).
How would you do this …
Read Article →How to Upgrade PIP
In this tutorial, you will learn how to upgrade PIP.
You will also learn how to check the current version of PIP, as well as downgrade to a previous …
Read Article →How to Copy a File in Python
In this tutorial, you will learn how to copy a file using Python from a directory to another directory, or if you’re on Windows, then from a …
Read Article →Conway’s Game of Life – Unlimited Edition – in Python
What is this?
geeksforgeeks.org
How the game works
Because the Game of Life is built on a grid of nine squares, every cell has eight neighboring …
Read Article →Most frequently used words in a text with Python
The challenge
Write a function that, given a string of text (possibly with punctuation and line-breaks), returns an array of the top-3 most occurring …
Read Article →The SongDecoder Dubstep Challenge with Java
The challenge
Polycarpus works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has decided to …
Read Article →Break camelCase Challenge in Java
The challenge
Complete the solution so that the function will break up camel casing, using a space between words.
Example …
Read Article →Sort Binary Tree by Levels using Python
The challenge
You are given a binary tree:
class Node:
def __init__(self, L, R, n):
self.left = L
self.right = R …How to Split a String with Python
Splitting a string in Python is really easy.
You simply take a string and apply the split() method.
"Your String".split()
See some examples …
Read Article →How to fix the Terraform stuck on “Refreshing state…” problem
Terraform is a fantastic tool to help automate your infrastructure as code.
Quite a few times however, I have noticed a few strange issues, one of …
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