Go for .NET Developers - Speaker Deck

Go for .NET Developers

by Sahan Serasinghe

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GO FOR .NET DEVELOPERS Sahan Serasinghe @_SahanSera

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AGENDA 01 The What & Why 02 Tooling 03 Basic language constructs 04 Unit testing 05 Building a HTTP Web Service 06 Multi-Arch Deployments Resources

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$ WHOAMI Sahan Serasinghe Software Engineer | GitHub Twitter: _SahanSera Blog: sahansera.dev {

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CODE SAMPLES /sahansera/adnug-go

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DISCLAIMER This is not to say that one language is superior to another These are just tools and not solutions I’m not a “Go” expert

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WHAT IS GO?

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GO Developed by Google in 2009 Released to the public in 2011 Strongly typed, compiled, garbage collected language Current version is 1.17 and 1.18 will be released in early 2022

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Ken Thompson Rob Pike Robert Griesemer

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GO IS BUILT WITH VERY SPECIFIC THINGS IN MIND speed of execution speed of compilation dependency management to concurrency and optimization

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GOOGLE’S DESIGN GOALS FOR GO Create a compiler that works on large codebases as fast as possible Create a compiler that generates fast code using a good set of optimizations

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GO’S PHILOSOPHY Keep it simple • Keywords C# ~100 vs Go – 25 Consistency • gofmt – Tabs vs Spaces Opinionated • Unused vars are a compiler errors

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GO & C# - AT A GLANCE No classes = No inheritance No try/catch No generics (yet) No LINQ No Semicolons to end lines

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WHY SHOULD YOU CARE ABOUT GO?

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Software Engineers Site Reliability Engineers SecOps Engineers Network Engineers

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OTHER COOL BITS… •No need to manage runtimes on the deployment environment •Popular projects in the cloud native world

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TOOLING

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INSTALLING GO go.dev

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GO TOOLING Go SDK Go CLI • go run • go build • go get • go vet • gofmt IDEs • VS Code, GoLand, VIM

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SO, WHERE’S THE CODE?

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YOUR FIRST GO PROGRAM DEMO

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AN OVERVIEW GO C#

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SYNTAX DEMO

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BASIC CONSTRUCTS • Variables • Packages/imports/modules • Slices & Loops • Conditionals • Functions • Structs • Pointers

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LIVE CODING TIME

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UNIT TESTING •Built-in testing commands • go test [-bench] [-cover] • package testing •No assertions library

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PROJECT STRUCTURE /cmd – Entrypoint(s) of the application /internal – Private application & library code /pkg – Library code visible to others /vendor – Application dependencies ⚠ if you are starting out, this is probably an overkill https://github.com/golang-standards/project-layout

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BUILDING A HTTP WEB SERVICE + JSON DEMO

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SIMPLE WEB SERVICE WITH GO & C# GO C#

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MULTI ARCH DEPLOYMENTS DEMO

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MORE COOL STUFF? Goroutines GopherJS GoNum TinyGo

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RESOURCES • https://gobyexample.com/ • https://go.dev/doc/effective_go • https://github.com/golang-standards/project-layout • https://github.com/avelino/awesome-go