Issue
Recently I’ve participated several Go job interviews. The first one asked me How is channel implemented?, then the second one asked How is goroutine implemented?. Well as you can guess, the next one asked How is a Go interface implemented?.
I’ve been using Go for six months, but to be honest I never did care or know these Go internals.
I tried to learn these by reading the source code of Go, but can’t really understand the quintessence.
So the question is, for a noob in Go, how do I learn the Go internals?
Solution
The most organized collection of internal resources links is probably this:
Other than that, answers to these questions aren’t collected in once place, but they are scattered in different blog posts.
Slice internals: The Go Blog: usage and internals
String internals: The Go Blog: Strings, bytes, runes and characters in Go
Constants internals: The Go Blog: Constants
Reflection insight: The Go Blog: The Laws of Reflection
Interface internals: RSC: Go Data Structures: Interfaces
Channel implementation: Overview on SO: How are Go channels implemented?
Channel internals: Go channel on steroids
Map implementation: Overview on SO: Golang map internal implementation – how does it search the map for a key?; also related: Go's maps under the hood
Map internals: Macro View of Map Internals In Go
Answered By – icza
Answer Checked By – Pedro (GoLangFix Volunteer)