Convert Roman to Integer number - Leet Code Solution
LeetCode "Roman to Integer" solved with a single left-to-right pass that handles subtractive cases like IV and IX, with full code walkthrough.
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Longest Common Prefix - Leet Code Solution
Write a function to find the longest common prefix string amongst an array of strings.
Integer to Roman conversion - Leet Code Solution
LeetCode "Integer to Roman" solved with a greedy value-symbol lookup table, including subtractive forms like IV and IX, with full code walkthrough.
Container with Most Water - Leet Code Solution
LeetCode "Container With Most Water" solved in O(n) with a two-pointer approach, with full walkthrough and complexity analysis.
Check whether an integer number given is palindrome or not - Leet Code Solution
Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward.
Remove nth Node from Last - Leet Code Solution
Given a linked list, remove the n-th node from the end of list and return its head.
How to sync Mongodb data to ElasticSearch by using MongoConnector
How to sync MongoDB data to Elasticsearch using the MongoConnector open-source tool.
How to run ElasticSearch cluster on Docker with Kibana on Linux
Step-by-step guide to running an Elasticsearch cluster with Kibana on Docker using docker-compose on Linux.
How to run MongoDB replica set on Docker
How to set up a MongoDB replica set cluster using Docker containers for local development and testing.
How to prepare for your next Coding Interview
Practical tips on how to prepare for coding interviews — study strategies, practice approaches, and what to focus on.
How to calculate angle between hour and minute hand, given a time
Calculate the angle between the hour and minute hands of a clock given any time, using simple degree-per-minute formulas.
How to use NPM Rest API to get audit (npm audit) result
How to use the NPM audit REST API to check for package vulnerabilities without installing packages.