Defining an Interface
type Interface_Name interface {
Method_Name(Input) (Outputs)
}Keyword : type, interface
Interface_name user provide a descriptive name
Within the { } curly bracket, method sets are a list of method_name has been defined method name with parameters, return. No implementation details.
type Speaker interface {
Speak() string
}https://golang.org/pkg/os/#FileInfo
type FileInfo
A FileInfo describes a file and is returned by Stat and Lstat.
type FileInfo interface {
Name() string // base name of the file
Size() int64 // length in bytes for regular files; system-dependent for others
Mode() FileMode // file mode bits
ModTime() time.Time // modification time
IsDir() bool // abbreviation for Mode().IsDir()
Sys() interface{} // underlying data source (can return nil)
}the FileInfo interface has the following method sets:
Name() string // return a string
Size() int64 // return int64
Mode() FileMode // return FileMode type
ModTime() time.Time
IsDir() bool // return a bool type
Sys() interface{} // return an interface type