How to upload files on AWS S3 by using curl, without having command line aws or other tool
Upload files to AWS S3 using only curl and a shell script — no AWS CLI or SDK required. Just your access key, secret key, and a presigned request.
The Archive of
Intentional Thought
Technical essays, architectural deep-dives, and practical guides at the intersection of code and design.
Page 21 of 30
How to connect to mysql from nodejs, with ES6 promise
How to connect to MySQL from Node.js and query data using ES6 promises with the promisify pattern.
Singleton Pattern with Thread-safe and Reflection-safe
How to implement a Singleton pattern in Java that is thread-safe, lazy-initialized, and protected against reflection-based instantiation using enums.
Magical usage of Bitwise operators - Get optimized solutions for many arithmatic problems
Practical bitwise operator tricks for coding interviews — check even/odd, swap without a temp variable, count set bits, and check power of 2.
Configure Grafana with OAuth Okta, SSL via Nginx, and JSON Dashboards on Docker
How to configure Grafana Community Edition with OAuth Okta authentication, SSL via Nginx, and dashboard loading from JSON in Docker.
Swap Nodes Pairs in Link List - Leet Code Solution
Given a linked list, swap every two adjacent nodes and return its head.
Three Sum Closest - Leet Code Solution
Given an array nums of n integers and an integer target, find three integers in nums such that the sum is closest to target. Return the sum of the three integers.
Three Sum - Leet Code Solution
Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.
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.
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.