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How to check if a String is a Number in Python
August 23, 2020
The challenge Given a string s, write a method (function) that will return true if its a valid single integer or floating number or false if its not.
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How to Write a Custom Comparator in Python
August 22, 2020
Generally, you want to use the built-in sorted() function which takes a custom comparator as its parameter.
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How to delete an AWS WAF – Web ACL
August 21, 2020
Usually, it’s quite easy to delete an AWS WAF, or Web ACL.
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How to Sort an Integer in Python
August 20, 2020
Let’s say that you have an integer with value of 9271 and you want to sort it either ascending(1279) or descending(9721).
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How to Copy a File in Python
August 18, 2020
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 Folder to another Folder.
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Conway’s Game of Life – Unlimited Edition – in Python
August 17, 2020
What is this? Conways’s Game Of Life is a Cellular Automation Method created by John Conway.
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Most frequently used words in a text with Python
August 16, 2020
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 words, in descending order of the number of occurrences.
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The SongDecoder Dubstep Challenge with Java
August 15, 2020
The challenge Polycarpus works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance.
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Break camelCase Challenge in Java
August 14, 2020
The challenge Complete the solution so that the function will break up camel casing, using a space between words.
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Sort Binary Tree by Levels using Python
August 13, 2020
The challenge You are given a binary tree: class Node: def __init__(self, L, R, n): self.
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How to Split a String with Python
August 12, 2020
Splitting a string in Python is really easy. You simply take a string and apply the split() method.
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How to fix the Terraform stuck on “Refreshing state…” problem
August 11, 2020
Terraform is a fantastic tool to help automate your infrastructure as code.
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The “Split Strings” Challenge using Java
August 10, 2020
The challenge Complete the solution so that it splits the string into pairs of two characters.
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Converting to PigLatin with Python
August 9, 2020
The challenge Move the first letter of each word to the end of it, then add “ay” to the end of the word.
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Solving the “Double Cola” Challenge using Java
August 8, 2020
The challenge Sheldon, Leonard, Penny, Rajesh and Howard are in the queue for a “Double Cola” drink vending machine; there are no other people in the queue.
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Convert Seconds to Human Readable Time (HH:MM:SS) using Java
August 7, 2020
The challenge Write a function, which takes a non-negative integer (seconds) as input and returns the time in a human-readable format (HH:MM:SS)
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Solving the “Mexican Wave” Challenge using Java
August 6, 2020
The challenge Task Your task is to create a function that turns a string into a Mexican Wave.
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Multiples of 3 and 5 with Python
August 5, 2020
The challenge This multiples of 3 and multiples of 5 challenge is a variation of the common FizzBuzz question.
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Solving the “Catching Car Mileage Numbers” Challenge using Python
August 4, 2020
The challenge "7777…8?!??!", exclaimed Bob, "I missed it again! Argh!" Every time there's an interesting number coming up, he notices and then promptly forgets.
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