“Who likes it” code Challenge in Python
The Challenge
You probably know the “like” system from Facebook and other pages. People can “like” blog posts, pictures or …
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In-depth guides, insights, and best practices for modern software engineering
Python 4 New Features Planned
It took the Python community a long time to move from Python 2 to Python 3. Now as we approach the possible end of Python 3 version history, we are …
Read Article →Custom RGB To Hex Conversion with Python
The challenge
The rgb function is incomplete. Complete it so that passing in RGB decimal values will result in a hexadecimal representation being …
Read Article →Sort a Java Integer in Descending Order
The challenge
Your task is to make a function that can take any non-negative integer as an argument and return it with its digits in descending order. …
Read Article →Get the Sum of Digits / Digital Root using Java
The challenge
Digital root is the recursive sum of all the digits in a number.
Given n, take the sum of the digits of n. If that value has more than …
How to write a Chain Adding Function in Python
The challenge
We want to create a function that will add numbers together when called in succession.
add(1)(2);
# returns 3
We also want to be able to …
Read Article →Get the next biggest number with the same digits using Python
The challenge
Create a function that takes a positive integer and returns the next bigger number that can be formed by rearranging its digits. For …
Read Article →Solving Tribonacci Sequence with Python
The challenge
As the name may already reveal, it works basically like a Fibonacci, but summing the last 3 (instead of 2) numbers of the sequence to …
Read Article →The Casino Chips Problem Solved with Python
The challenge
You are given three piles of casino chips: white, green and black chips:
- the first pile contains only white chips
- the second pile …
Check if Isogram using Python
The challenge
An isogram is a word that has no repeating letters, consecutive or non-consecutive. Implement a function that determines whether a …
Read Article →Find the Longest Common Prefix using Python
The challenge
Write a function to find the longest common prefix string amongst an array of strings. This string manipulation challenge requires …
Read Article →Count and Say with Python
The challenge
he count-and-say sequence is the sequence of integers with the first five terms as following:
1. 1 2. 11 3. 21 4. 1211 …Read Article →
The Plus One problem solved with Python
The challenge
Given a non-empty array of digits representing a non-negative integer, increment one to the integer. This challenge involves array …
Read Article →Solving the Single Number problem in Python
The challenge
Given a non-empty array of integers, every element appears twice except for one. Find that single one.
Note:
Your algorithm should have …
Read Article →Rotate a Matrix List in Python
The challenge
You are given an n x n 2D matrix representing an image.
Rotate the image by 90 degrees (clockwise).
Note:
You have to rotate the image …
Read Article →Check if Valid Sudoku Blocks in Java
The challenge of solving valid Sudoku blocks
Determine if a 9×9 Sudoku board is valid. Only the filled cells need to be validated according to the …
Read Article →Find the Intersection of Two Arrays in Python
The challenge
Given two arrays, write a function to compute their intersection.
Example 1:
Input: nums1 = [1,2,2,1], nums2 = [2,2] Output: [2,2] …Read Article →
Rotate an Array K Times in Python
The challenge
Given an array, rotate the array to the right by k steps, where k is non-negative.
Example 1:
Input: nums = [1,2,3,4,5,6,7], k = 3 …Read Article →
FizzBuzz in Java
The challenge
Write a program that outputs the string representation of numbers from 1 to n.
But for multiples of three it should output “Fizz” …
Read Article →Python Splices reimplemented in Java
Python has a fantastic feature called slices. It allows you to work with a list, set or string by it’s index items.
E.g.:
string_sample = …Solving Two Sum in Python
The challenge
Given an array of integers, return indices of the two numbers such that they add up to a specific target.
You may assume that each input …
Read Article →Get the Next Small Integer in Python
The challenge
Write a function:
def solution(A)
that, given an array A of N integers, returns the smallest positive integer (greater than 0) that does …
Read Article →Is a Valid Palindrome with Java
The challenge
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
Note: For the purpose of …
Read Article →Is a Valid Anagram with Java
The challenge
Given two strings s and t , write a function to determine if t is an anagram of s.
Example 1:
Input: s = "anagram", t = "nagaram" …Read Article →