Here are some problems that require Python basic knowledge about Lists, Strings and operators. Digits Multiplication You are given a positive integer. Your function should calculate the product of the digits excluding any zeroes. For example: The number given is 123405. The result… Continue Reading
In 1868 Lewis Carroll published “The Alphabet-Cipher”. They say he did this in a kids magazine ?. While Carroll called his cipher “unbreakable” we know it is not. However it is still interesting to implement such a cipher as a… Continue Reading
Reversing a string in Swift is done by using the reversed() method on its characters, then creating a new string out of the result. Here’s the code: Reverse a String without using reversed built-in function in Swift can be done using Swift higher order… Continue Reading
ROT13 is a simple algorithm that shifts letters in a string forward 13 places. It’s not hard to write a rot13() function, but it is a little harder to wrap it up neatly so you avoid global variables while still making… Continue Reading
Whether or not type aliases are syntactic sugar or provide more code clarity, is a common source of debate among developers. While being able to write code in a more concise manner, it can also sometimes make the result harder to read… Continue Reading
UI testing is a great way to ensure that your UI interactions keep working as you’re adding new features or refactoring your app’s codebase – it keeps your app functional. Writing and running UI tests is kind of different from… Continue Reading
In Objective-C, there are three different varieties of nothing . The reason for this goes back to how Objective-C bridges the procedural paradigm of C with Smalltalk-inspired object-oriented paradigm. C represents nothing as 0 for primitive values, and NULL for… Continue Reading
In computer science, the longest palindromic substring problem is the problem of finding a maximum-length substring of a given string that is also a palindrome. For example, the longest palindromic substring of “bananas” is “anana”. Some people will be tempted… Continue Reading
Swift package manager provides a convention-based system for building libraries and executables, and sharing code across different projects. Before you can use it you should make it available on MacOS by installing Swift Open Source Toolchain. Install Package Manager Download the latest package release –… Continue Reading
Greedy algorithms look for a simple, easy-to-implement solution to complex problems. These algorithms work by recursively constructing a smaller instance of the the same problem with a rule that is easy to understand and straightforward. The advantage is they are… Continue Reading