Go use error properly
This blog investigates the error types in golang and summerizes a best practice for using errors.
Go Language¶
Server Side Request Serving Precedures in GRPC
This page is next to the client side details, Request Sending Precedures in GRPC Client Side. There are more details in it, which means this page will much more brief than previous one. Still, I focus on the core logic, ignoring like interceptors.
Copy Behaviors in Go
In cpp, there are concepts of reference , value, right value and left value. The go is very similar with some idolisms of C++, for example we cannot copy the iostream in cpp, as the same io in go always passed by reference with the help of interface.
However, go doesn’t have reference acurrately, as it only has concepts about value and pointer. The reference in title should be called pointer also.
C++ has a dilicated way to control what happened when copying and moving, but golang doesn’t have such concepts, which means the complexities are hidden in the compiler and runtime.
Let’s focus on the copy behavior of basic types in golang, we can see that when copying, map, chan and context are treated as reference, the origin one and copied one share the same one. It’s worthy to know why some types are copied by reference instead of value.
Functions Cannot Compare
In go, there are some cases when we need to check functions in some cases:
- check the equality of functions
- compare two objects with function fields.
However, function type in Go is not addressable and not comparable.
How Go Exec Works
It’s common to run and wish to get results. As the command is executed in a forked child process, how results are passed back? This blog investigates how output is passed to parent process in command.Output.