Eventually, they’ll bump into this diagram: So they go on to research about containers, and every post about containers on Docker’s documentation is going to talk about containers v.s. After that, they would spend five minutes looking at the page before realizing that they don’t understand what a container is.Īt this point, you might think, “If I don’t understand what a container is, then I can’t understand anything else on this page! I need to Google with a container is.” Then you can create many copies of those containers, which in turn allows you to handle a ton of logins at once.īased on my own personal experiences, this is how most programmers would learn Docker.įirst, they would open up Docker’s getting started page.

To quickly summarize this for anyone unfamiliar with Docker, you’ll use Docker to put a tiny, individual piece of an app, like a login system, into a “container”. You need to use Docker because you want to setup a scalable microservice configuration. In my experience, after teaching programming for several years, many programmers fall into this pitfall because they “need to understand how everything works”. It turns out that this principle applies to programmers as well. And yet the intuition and understanding is there. Or the fact that visible light is a spectrum of wavelengths, with several bands that correspond to different colors. But oddly enough, when you give this explanation to a child, they suddenly just understand it intuitively, so intuitively in fact that they’ll even be able to explain why a puddle can form a tiny little rainbow.īut we didn’t mention anything about puddles. There’s no explanation about why the scattering happens, or why visible light can even split into individual colors. How do you feel about this answer? From a technical aspect, it’s very hand-wavy and magical. And just like how this prism can scatter light into different colors, the same thing happens in the sky, except it reflects off mostly blue instead. Visible light goes in, a spectrum of colors comes out. While this answer is correct and thorough, no child would understand this.īut instead, what happens when you explain it by showing a child a triangular prism with sunlight reflecting through it? If so, how would you respond? Would you say, “Well, you see, there are lots of tiny molecules in the atmosphere, and thanks to a phenomenon called Rayleigh scattering, blue light gets scattered more strongly than the other colors because blue light has a longer wavelength than the other colors.” Have you ever had a child ask you, “Why is the sky blue?”

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