go中的函数数组语法是什么意思？

Question

var list = []func(*someType) error {
        ...
    }

I am new to Go and I am trying to understand what does the syntax mean ? Is the return of function an array?

Answer 1

This declares and initializes a variable list as a slice whose elements are functions with signature func(*someType) error.

Slices in Go are convenient mechanisms for representing sequences of data of a particular type. They have type []T for any element type T (but remember Go does not have generics). A slice is defined only by the type of the items it contains; its length is not part of its type definition and can change at runtime. (Arrays in Go, by contrast, are of fixed length - their type is [N]T for length N and element type T).

Under the surface, a slice consists of a backing array, a length of the current data and a capacity. The runtime manages the memory allocation of the array to accommodate all data in the slice.