Ruby-code Find All Pairs In An Array That Sum To A Target Value In Ruby Return every pair of distinct elements that add up to a target — a classic interview problem with an efficient hash-based O(n) solution.
Ruby 3 Ruby Threads and Thread Safety — Practical Concurrency Without the Chaos Threads in Ruby have a complicated reputation — partly because of the Global Interpreter Lock (GIL) in MRI Ruby, partly because concurrent code genuinely is harder to reason about, and partly because most
Rails Action Mailer in Rails — Production-Ready Email Without the Footguns Email in Rails looks deceptively simple — generate a mailer, write a template, call deliver_later. The basics take ten minutes. The production footguns take longer to find: emails sent synchronously blocking requests, views
Developer tips Remote Work Survival Guide — What Nobody Tells Developers Before They Start Remote work sounds like the obvious upgrade: no commute, flexible hours, work from anywhere. And for many developers, it is. But there’s a specific failure mode that’s invisible in job descriptions and glossy
Ruby-code Calculate A Running Total Of An Array In Ruby Compute cumulative sums (running totals) — each element in the result is the sum of all preceding elements plus itself. Useful for financial calculations, progress tracking, and time series data.
Ruby 3 Metaprogramming with define_method — Writing Code That Writes Code in Ruby Metaprogramming gets a reputation for being either magic or dangerous, depending on who you ask. Used carelessly, it produces code that’s impossible to trace and impossible to test. Used deliberately, it eliminates repetitive
Rails N+1 Queries in ActiveRecord — Diagnosis, Eager Loading, and When Preloading Backfires N+1 queries are one of those problems that makes perfect sense once you understand them, and that silently degrades production performance until a request that touches 500 records starts taking four seconds. The
Developer tips How to Write a Technical Blog Post That People Actually Read Most technical blog posts fail at the same place: the opening. They start with a definition, a history of the problem, or a tour of all the things they won’t cover. By the
Ruby-code Find The Most Frequently Occurring Element In An Array In Ruby Count element occurrences and return the one that appears most often — useful for analytics, voting systems, and mode calculations.
