Grant Riordan articles - 112 total
Spread Operator and Chaining in JS/TS
Hey, so I’m sometimes asked how the spread operator works in JS especially when working with chained...
C# LeetCode 268: Missing Number - (Easy)
LeetCode 268: Missing Number This problem gives you an array of distinct numbers ranging from 0 to...
LeetCode 8: String to Integer (atoi) - Medium
Mastering LeetCode 8: String to Integer (atoi) A Simple and Efficient...
LeetCode 206: Reverse Linked List - (Easy)
Given the head of a singly linked list, reverse the list, and return the reversed list. ...
Extension Members: My New Favourite Feature in C# 14
The release candidate of .Net10 was released on the 9th September [2025], which comes with C# 14, and...
C# LeetCode 1792: Maximum Average Pass Ratio - (Medium)
LeetCode 1792: Maximum Average Pass Ratio - (Medium Difficulty) Intuition Needed a way to...
LeetCode 168: Excel Sheet Column Title (Easy)
Approach This problem is essentially a base-26 conversion, where the "digits" are the 26...
Stop Throwing Exceptions: The ServiceResult<T> Pattern for Clean API
Error handling in APIs can get pretty messy, right? Whether it's throwing exceptions for "expected"...
When Benchmarks Lie: A Case of “0ns” String Comparisons
Recently, while reviewing code, I spotted a colleague using ToLower() for a case-insensitive string...
C# LeetCode 136: Single Number - (Easy)
Problem Given a non-empty array of integers nums, every element appears twice except for...
C# LeetCode 125: Valid Palindrome - (Easy)
Problem A phrase is a palindrome if, after converting all uppercase letters into lowercase...
C# LeetCode 118: Pascal's Triangle - (Easy)
Problem Given an integer numRows, return the first numRows of Pascal's triangle. In...
C# LeetCode 112: Path Sum -(Easy)
Problem Given the root of a binary tree and an integer targetSum, return true if the tree...
C# LeetCode 88: Merge Sorted Array - (Easy)
Problem You are given two integer arrays nums1 and nums2, sorted in non-decreasing order,...
C# LeetCode 104: Maximum Depth of Binary Tree - (Easy)
Problem Given the root of a binary tree, return its maximum depth. A binary tree's...
C# LeetCode 101: Symmetric Tree
Problem Given the root of a binary tree, check whether it is a mirror of itself (i.e.,...
C# LeetCode 83: Remove Duplicates from Sorted List
Problem Given the head of a sorted linked list, delete all duplicates such that each...
C# LeetCode 35: Search Insert Position
Problem Given a sorted array of distinct integers and a target value, return the index if...
C# LeetCode 66: Plus One - (Easy)
Problem You are given a large integer represented as an integer array digits, where each...
C# LeetCode 94: Binary Tree Inorder Traversal - (Easy)
Problem Given the root of a binary tree, return the "inorder traversal" of its node's...
C# LeetCode 100: Same Tree - (Easy)
Problem Given the roots of two binary trees p and q, write a function to check if they...
Python LeetCode 70: Climbing Stairs - (Easy)
Problem You are climbing a staircase. It takes n steps to reach the top. Each time you...
C# LeetCode 69: Sqrt(x)
Problem Given a non-negative integer x, return the square root of x rounded down to the...
C# LeetCode: 27 Remove Element
Problem Given an integer array nums and an integer val, remove all occurrences of val in...
C# LeetCode 58: Length of Last Word
Problem Given a string s consisting of words and spaces, return the length of the last...
C# LeetCode 28: Find the Index of the the First Occurrence in a String
Problem Given two strings needle and haystack, return the index of the first occurrence of...
C# LeetCode 21: Merge Two Sorted Lists
Problem: You are given the heads of two sorted linked lists list1 and list2. Merge the...
TS LeetCode 20: Valid Parentheses - (Easy)
Problem Given a string s containing just the characters '(', ')', '{', '}', '[' and ']',...
C# LeetCode 14: Longest Common Prefix
Problem Write a function to find the longest common prefix string amongst an array of...
C# LeetCode 13: Roman To Integer - (Easy)
This solution beat 99.94% of submissions for time This solution beat 77.21% of submissions for memory...