The Little Go Book. Karl Seguin
The Little Go Book. Karl Seguin

The Little Go Book. Karl Seguin

I’ve always had a love-hate relationship when it comes to learning new languages. On the one hand, languages are so fundamental to what we do, that even small changes can have measurable impact.

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That aha moment when something clicks can have a lasting effect on how you program and can redefine your expectations of other languages. On the downside, language design is fairly incremental. Learning new keywords, type system, coding style as well as new libraries, communities and paradigms is a lot of work that seems hard to justify.

Compared to everything else we have to learn, new languages often feel like a poor investment of our time. That said, we have to move forward. We have to be willing to take incremental steps because, again, languages are the foundation of what we do.

Though the changes are often incremental, they tend to have a wide scope and they impact productivity, readability, performance, testability, dependency management, error handling, documentation, profiling, communities, standard libraries, and so on. Is there a positive way to say death by a thousand cuts? That leaves us with an important question: why Go? For me, there are two compelling reasons.

The first is that it’s a relatively simple language with a relatively simple standard library. In a lot of ways, the incremental nature of Go is to simplify some of the complexity we’ve seen being added to languages over the last couple of decades.

The other reason is that for many developers, it will complement your existing arsenal. Go was built as a system language (e.g., operating systems, device drivers) and thus aimed at C and C++ developers. According to the Go team, and which is certainly true of me, application developers, not system developers, have become the primary Go users.

Why? I can’t speak authoritatively for system developers, but for those of us building websites, services, desktop applications and the like, it partially comes down to the emerging need for a class of systems that sit somewhere in between low-level system applications and higher-level applications.

Maybe it’s a messaging, caching, computational-heavy data analysis, command line interface, logging or monitoring. I don’t know what label to give it, but over the course of my career, as systems continue to grow in complexity and as concurrency frequently measures in the tens of thousands, there’s clearly been a growing need for custom infrastructure-type systems. You can build such systems with Ruby or Python or something else (and many people do), but these types of systems can benefit from a more rigid type system and greater performance.

Similarly, you can use Go to build websites (and many people do), but I still prefer, by a wide margin, the expressiveness of Node or Ruby for such systems.

 

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