You can view the question from https://www.hackerrank.com/challenges/balanced-brackets Question Explanation You are given a string of brackets such as {[()]} and you want to check if it is balanced. For example, {[(])} is not balanced because the contents in between { and } are not balanced. The pair of square brackets encloses a…

You can view the question from https://www.hackerrank.com/challenges/equal-stacks This is a Stack Data Structure question. If you are unsure about stack data structure in Swift, you can view Stacks in Swift — Data Structure post which I explained more. Question Explanation You are given three stacks of cylinders where each cylinder has a…

You can view the question from https://www.hackerrank.com/challenges/array-left-rotation If you are unsure about stack data structure in Swift, you can view Stacks in Swift — Data Structure post which I explained more. Question Explanation You are required to perform queries on the stack depending on the given N queries (given as as array…

Stacks data structure is identical to real life when you stack physical items such as a book (📚 Stack of Books) . When you remove a book from a stack of books, you remove it from the top. …

You can view the question from https://www.hackerrank.com/challenges/array-left-rotation Question Explanation Given an array of elements you are required to shift each element to the left by 1 unit. This will resulted in the element in index 0 to shift to the back (which is the array length). For example, d which is the…

How to set up live rendering with @IBDesignable and @IBInspectable with UIKit? Swift 5 with Code and image example. — Sometime you create a view using code but the shape and styling didn’t shown up in the Storyboard and only when you run the stimulator or run on your device then you are able to see the styling you created with code. It frustrating when you are trying to design…

You can view the question at https://www.hackerrank.com/challenges/sparse-arrays/ Question Explanation You are give a array of string such as ["aba", "baba", "aba", "xzxb"] and you are required to count the number of occurrence of each query such as ["aba", "xzxb", "ab"] in the array of string, [“aba”, “baba”, “aba”, “xzxb”] : “aba”= 2 [“aba”…

Three most important data structures in Swift are Array, Dictionaries and Sets. Arrays and dictionaries are commonly used in almost all the apps as compare to sets. However, it is still a common and important data structure to keep as a toolkit. If you want to learn more about arrays…

You can view the question from https://www.hackerrank.com/challenges/arrays-ds/problem . Question Explanation In this HackRank problem, we need to create a function that take in a 2-dimensional array of integers as an input and calculate the sum of every hourglass in that array. An hourglass has a shape a I, as shown as the…