Learning Golang: Interface Types - Part 2 (empty interface, type assertion and type switches)

Описание: Welcome! Let's learn about Go Types, specifically Interface Types, a little bit of Functions and Methods; and why all of those types are somehow interconnected.

What is an Interface in Go?

An interface type is defined as a set of method signatures, a value of interface type can hold any value that implements those methods.

How to implement Interfaces in Go?

Compared to other programming languages, a type implements an interface IMPLICITLY by implementing the methods; there's no need to refer to the original interface, there's no concept of "extends" or "implements". This means the actual concrete implementation of a type could appear in any other package without prearrangement.

In this episode I cover more about interfaces and types in Go like:

Empty interface "interface{}",
nil interfaces,
Type assertions, and
Type switches

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RELEVANT LINKS

Previous episode:    • Learning Golang: Interface Types - Part 1  

Example code: https://github.com/MarioCarrion/video...
"Why is my nil error value not equal to nil?" https://golang.org/doc/faq#nil_error

Playlist "Software Architecture in Go":    • Software Architecture and System Design in...  
Playlist "Learning Go":    • Learning Go/Golang  
Playlist "Building Microservices in Go":    • Building Microservices in Golang/Go  
Playlist "GoTools and Packages":    • Golang/Go Tools and Packages  
Playlist "Testing in Go":    • Testing in Golang/Go  

00:00 Intro
00:29 What is in an interface value in Golang?
04:27 Calling interface values with nil in Golang?
07:13 What is the empty interface{} in Golang?
08:35 Type Assertions and Type Switches in Golang
14:17 Conclusion - Interface Types in Golang

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Who am I:

Hello👋🏼! I'm Mario, a Hands-on Software Architect and Lead Backend Engineer with more than 16 years of professional experience building all kinds of software including on-premise Industrial Automation Systems, Linux Accessibility Desktop and Browser Components as well as Distributed Advertising Microservices.

Every week I will share with you different topics I've learned while working for small startups and large companies including the processes I've followed over the years for successfully delivering complex enterprise systems from start to end.

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#golang #microservices #programming

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