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Check if Valid Sudoku Blocks in Java

July 14, 2020

Java

The challenge of solving valid Sudoku blocks Determine if a 9×9 Sudoku board is valid.

Find the Intersection of Two Arrays in Python

July 13, 2020

Python

The challenge Given two arrays, write a function to compute their intersection.

Rotate an Array K Times in Python

July 12, 2020

Python

The challenge Given an array, rotate the array to the right by k steps, where k is non-negative.

FizzBuzz in Java

July 11, 2020

Interview , Java

The challenge Write a program that outputs the string representation of numbers from 1 to n.

Python Splices reimplemented in Java

July 10, 2020

Java , Python

Python has a fantastic feature called slices. It allows you to work with a list, set or string by it’s index items.

Solving Two Sum in Python

July 9, 2020

Python

The challenge Given an array of integers, return indices of the two numbers such that they add up to a specific target.

Get the Next Small Integer in Python

July 8, 2020

Interview , 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 not occur in A.

Is a Valid Palindrome with Java

July 7, 2020

Java

The challenge Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.

Is a Valid Anagram with Java

July 6, 2020

Java

The challenge Given two strings s and t , write a function to determine if t is an anagram of s.

How to ReImplement strStr() in Java

July 5, 2020

Java

What we want to achieve Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.

Third Maximum Number with Java

July 4, 2020

Java

The challenge Given a non-empty array of integers, return the third maximum number in this array.

How to Quickly Hide all Icons on a Mac’s Desktop

July 3, 2020

Why the need to hide icons? Perhaps you have a screen-share session coming up and you want a nice clean desktop to show everyone.

First Unique Character in a String using Java

July 2, 2020

Java

The challenge Given a string, find the first non-repeating character in it and return its index.

How to fix the Release Version 5 Not Supported error in IntelliJ

July 1, 2020

Java

What do you do when you create a new Maven Java project, and when you run it, you get the following error:

Facebook’s custom IPv6 range

June 30, 2020

Misc

I noticed an interesting thing with a certain visitor after posting a blog post to Facebook.

How to Reverse an Integer in Java

June 29, 2020

Java

The challenge Given a 32-bit signed integer, reverse digits of an integer.

Reverse a String in-place using Java

June 28, 2020

Java

The challenge Write a function that reverses a string. The input string is given as an array of characters char[].

Check if a Java array Contains Duplicates

June 27, 2020

Java

The challenge Given an array of integers, find if the array contains any duplicates.

Find All Numbers Disappeared in an Array using Python

June 26, 2020

Python

The challenge Given an array of integers where 1 ≤ a[i] ≤ n (n = size of array), some elements appear twice and others appear once.

The Array Height Checker Problem in Java

June 25, 2020

Java

The challenge Students are asked to stand in non-decreasing order of heights for an annual photo.

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