How to Rename a Git Branch | Local & Remote Branches Explained
How to Rename a Git Branch | Local & Remote Branches Explained Created a branch with the wrong name? You don't need to delete your work and start over — a...
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Technical videos
Walkthroughs and talks on backend architecture, AI automation and the tooling we build with.
Search Git History Like a Pro | Git Log, Blame, Show & Diff Explained
Search Git History Like a Pro | Git Log, Blame, Show & Diff Explained Ever wondered who changed a line of code, when it happened, or why your application...
What Is Git Stash? Save Uncommitted Changes and Switch Branches Safely
Ever needed to switch Git branches while your work is still unfinished? Git Stash lets you temporarily save uncommitted changes, clean your working...
What Is Git Cherry-Pick? Explained with a Real Developer Example
What Is Git Cherry-Pick? Explained with a Real Developer Example Need one specific commit from another Git branch without merging everything? Git...
Git Merge vs Git Rebase Explained — What's the Difference?
Git Merge vs Git Rebase Explained — What's the Difference? Git Merge vs Git Rebase — both integrate changes from different branches, but they handle Git...
What Is a Git Worktree? Work on Multiple Branches at Once
Ever needed to fix a production bug while working on an unfinished feature? Git Worktree lets you create multiple working directories linked to the same Git...
What Is a Race Condition? Lost Updates Explained with Rails
Two customers withdraw from the same account at the same moment. The balance starts at $1,000, one takes $200, the other takes $300 — and the account ends up...
What Is a Message Queue? Rails, Redis and Sidekiq Explained
Ever wondered why some applications make you wait after clicking a button? Often the problem isn't the request itself — it's everything the application tries...
What Is a Webhook? Stop Polling, Start Listening
Your app needs to know the moment a payment succeeds. So how often should it ask? Or what if it never had to ask at all? This is the webhook pattern...
What Is Kubernetes? Desired State and Self-Healing Explained | Learn in 30 Seconds
What Is Kubernetes? Desired State and Self-Healing Explained | Learn in 30 Seconds Traffic spikes. Containers fall over. Who's restarting them at three in...
What Is Multi-Tenancy? One App, Many Customers, Isolated Data | Learn in 30 Seconds
One application serving hundreds of companies, each seeing only its own data, users and settings. That's multi-tenancy — and it's how almost every SaaS...
Single Responsibility Principle in Ruby: One Reason to Change | Learn in 30 Seconds
You've seen this class. It persists the user, sends their welcome email, and builds the monthly report — all in one file: class User ApplicationRecord ...
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