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Support for channels in Go gives us the opportunity to compose code using pure functions — functions that take state and return state without side effects.

From experience 3 signatures for these pure functions emerge:

Simple Functions

These functions don’t use channels as parameters, rather take and return standard data structures (structs, slices, maps etc.) and optionally an error, blocking until results are available.

Concurrency and channels stay outside the function leaving us with several advantages: simplicity of code, ease of testing, focus on logic and control flow without the distraction of concurrency.

The problem of course is that this will…

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Being a relatively new industry software engineering terminologies and analogies have come predominantly from civil engineering and manufacturing. Terms such as architecture, foundation, build, production, cycle time, lean… dominate.

This strategy serves the purpose when talking to someone outside the profession by helping them relate; and stops us software engineers from sounding even more nerdy than we already do.

However, it does introduce a problem when we use this language with junior software engineers entering the profession and even in general day to day professional conversation. …

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Go has native concurrency constructs which free the developer from dealing with OS threads and instead allows them to think in higher level abstractions. And it is elegant and refreshingly simple to use.

After safety and correctness, the main challenge with writing concurrent code, in general, is readability. Even with the constructs available in Go, it is quite easy to end up with code that requires the reader to jump around various sections of a function or file to make sense of the control flow.

Additionally with Go’s design of goroutines as entities without explicit cancellation and cooperative scheduling, it’s…

Arun Barua

Passionate about Software Engineering. Go evangelist.

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