Time for maps! 🗺️ and just like maps we use to point to specific locations in the world, a map in Go is no different! We use a key to point to a value. In other languages they are called Dictionaries, Hash Tables, or Associative Arrays. Wikipedia provides us with a showing of just how timeless ⏳ this data structure truly is. Setup Let’s make our directory maps and the files we want inside of that directory example_test....
The range keyword works the same way we use it in speech. Example 1 Friend Asks: What are your feelings on all of the Star Wars movies? You say: Eh, my feelings range from hot garbage to best movies of all time. Example 2 If you come to my town we have a huge range of restaurants 🌮🍙🍺🍲 🥙 to choose from. Example 3...
Maybe it’s the nerd in me 🤓 but when I hear rune my mind goes to the dragon-born 🐲 FUS-RO-DAH!! 🌬️ Just me? 🙃 anyways, time to level up ⬆️ on our rune game. It cannot be overstated. A rune is an int32. Plain and simple. The type is there to help guide us into understanding it is an int32 specifically for strings, but it’s an int32, yeah? Well, 🤔 Maybe we can step back and find out what it means to be int32 and then understand how runes fit into that....
It’s time for the FUNC 🪩🕺 Can you handle it? Function that is and of course you can handle it! 😄 We’ve been using them this entire time. We’ve needed some preliminary exposure to other keywords before we can dig into function. So let’s get func-y 😹 and boogie on down to our next lesson. In it’s purest form a function takes in zero to many inputs and produces one to many outputs....
Data structure aka struct is used to group like data together. For example humans are made up of data. 😯 And not only are humans made up of data, 😮 that data can be seen in different views! 😲 What do I mean by this? Think about it from a doctor’s perspective, what might a doctor take data about? 🤔 Your temperature, your weight, your height, blood pressure, etc. Now what data does a bank collect from a person?...
Pointers in nutshell 👆👆👆 TA-DA!!!! Now you get pointers! 😂 Seriously though, it’s that easy. I remember the first time I was introduced to pointers they seemed so mystical and hard to understand, but trust me when you get it, you get it. Let’s Go 😹 get it then! A pointer points to 👉 something. There are thousands of pointers that point to you. Are you on social media (IG 📷 FB 📖 TW 🐦 TT 🎵 🔗in, Snap👻)?...
There’s a good chance you’re coming from another programming language while reading this and if that’s true, it must be explicitly said: Go does not support Object-Oriented Programming (OOP). Sorry not sorry 🙃 I say that because it has been stated (and argued 😂) time - and - time - again That inheritance belongs in the bin 🗑️ Now don’t get me wrong Abstraction? ✅ We got that Polymorphism?...
The word interface sounds intimidating 😰 and some explanations can be more harmful 🤕 than helpful. Even worse there are plenty of definitions of interface in software engineering and in programming languages😩 but we’re not going to look at a rigorous definition of what interface means. Nor are we going to cover how other languages define their interface. We’re Go-ing 😹 to keep it as simple and easy as possible....
Embedding is what’s done to diamonds 💎 when they are put in a ring 💍 You take something and place it deeply within something else. So that it becomes a part of it. Maybe you’ve embedded your phone case to your phone? 📱 I know I have, the thing’s impossible to get off! Setup Let’s make our directory embed and the files we want inside of that directory example_test.go embed.go...
🤖 🚨🚨 ERROR 🚨🚨 🤖 🚨🚨 ERROR 🚨🚨 🤖 This is not a drill we’re going down❗ The story’s 📖 coming to a close❗ The application 🖥️ is going to crash❗ – Calm down ❗❗ This is no time to panic . Like any Gopher worth their salt, we’ll handle our error gracefully. What’s an error in Go and why should we handle it gracefully? Let’s start with the first question....