Arrays vs Objects, Dynamic Content, and a Deep Dive into Git Stash

A heavier session today — some solid React mental models and then a proper deep dive into Git stash and diff commands. The kind of stuff that makes you feel a lot more comfortable in the terminal. Arrays and Objects — They Work Differently, Treat Them Differently In React (and JavaScript in general) these two are not interchangeable and the way you access data from each one reflects that. With arrays, position is everything. You access data by index — items[0], items[2]. The order matters, the number matters. With objects, it's all about the key. You access data by name — user.name, product.price. Just writing user alone won't print anything useful — you have to tell it which property you want. object.name is mandatory, not optional. Small distinction on paper, massive difference in practice when you're debugging why something isn't rendering. How content[activeContent] Actually Works This is a really elegant pattern once you see what's happening behind the scenes: {content[activeConte