Applied Go

The sync/atomic package recommends using atomic types and their methods instead of the package-level atomic functions. For good reasons.

WaitGroups are a means of synchronizing goroutines; yet the Add()/defer Done() idiom feels clumsy and is error-prone. A new method, Go(), puts an end to goroutine counting.

POSIX threads have an array of control functions, goroutines have none. When to exit is a goroutine's decision. Here's how to properly stop them from the outside.

Package level APIs are convenient, but they aren't concurrency safe. Here is how and when to use them.

In a select block, don't be tempted to add a default case as a "fallback" or it might turn into a busy loop.