▲ 7 ▼ The behavior of channels
When I started to work with Go’s channels for the first time, I made the mistake of thinking about channels as a data structure. I saw channels as a queue that provided automatic synchronized access between goroutines. This structural understanding caused me to write a lot of bad and complicated concurrent code.
I learned over time that it’s best to forget about how channels are structured and focus on how they behave. So now when it comes to channels, I think about one thing: signaling. A channel allows one goroutine to signal another goroutine about a particular event. Signaling is at the core of everything you should be doing with channels. Thinking of channels as a signaling mechanism will allow you to write better code with well defined and more precise behavior.