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

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

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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[MrAverageViewer]

Could you provide a real-world example of the use of an interface, such as what might be used in an e-commerce application, or a dating website, or some relatable concept? I'm still not clear on specific use-cases wherein an interface would be utilized. I find most videos on Youtube focus on intermediate to experienced programmers. Relatable analogies usually work best for beginners & new learners to coding.

[TheDoppelganger]

Thanks for these videos, I know this stuff already but like to watch it how you explain it :)

[MaksymMinenko]

Sorry, but it looks like you got a talent of making things even more complicated than they are...

[garciajero]

these videos are really helpful thank you!!