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?
2 Answers
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.
Comments
func in go is a type like int,string...
So they are sample syntax:
var listInt := []int{1,2,3}
var listStr := []string{"1","2","3"}
var listFunc := []func(param anyType) anyType {
func(param anyType) anyType { ... return new(anyType) },
func(param anyType) anyType { ... return new(anyType) },
}
[]"slice of"funcfunction,("from argument",*pointer to,someType"someType",)"returning an",error"error". Could not be much simpler.