Interface names conventions
By convention, one-method interfaces are named by the method name plus an -er suffix.
type Greetinger interface {
Greeting() string
}Define an interface type
It start with the keyword “type” follow by the interface name (ended with -er). Begin of a block of code symbol “{“, the function name (eg. Greeting() function and return a string ). One or more than one function can be added here then is often called a method set and ending of a block of code “}”.
// https://golang.org/pkg/os/#FileInfo
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)
}In the above OS package, has FileInfo interface contains the following method sets
- Name() string
- Size() int64
- Mode() FileMode
- ModTime() time.Time
- IsDir() bool
- Sys() interface{}