本文實(shí)例講述了Go語(yǔ)言中使用反射的方法。分享給大家供大家參考。具體實(shí)現(xiàn)方法如下：
復(fù)制代碼 代碼如下:
// Data Model
type Dish struct {
Id int
Name string
Origin string
Query func()
}
type Dish struct {
Id int
Name string
Origin string
Query func()
}
創(chuàng)建實(shí)例如下：
復(fù)制代碼 代碼如下:
shabushabu = Dish.new
shabushabu.instance_variables # => []
shabushabu.name = "Shabu-Shabu"
shabushabu.instance_variables # => ["@name"]
shabushabu.origin = "Japan"
shabushabu.instance_variables # => ["@name", "@origin"]
shabushabu.instance_variables # => []
shabushabu.name = "Shabu-Shabu"
shabushabu.instance_variables # => ["@name"]
shabushabu.origin = "Japan"
shabushabu.instance_variables # => ["@name", "@origin"]
完整代碼如下：
復(fù)制代碼 代碼如下:
package main
import(
"fmt"
"reflect"
)
func main(){
// iterate through the attributes of a Data Model instance
for name, mtype := range attributes(&Dish{}) {
fmt.Printf("Name: %s, Type %s\n", name, mtype.Name())
}
}
// Data Model
type Dish struct {
Id int
Name string
Origin string
Query func()
}
// Example of how to use Go's reflection
// Print the attributes of a Data Model
func attributes(m interface{}) (map[string]reflect.Type) {
typ := reflect.TypeOf(m)
// if a pointer to a struct is passed, get the type of the dereferenced object
if typ.Kind() == reflect.Ptr{
typ = typ.Elem()
}
// create an attribute data structure as a map of types keyed by a string.
attrs := make(map[string]reflect.Type)
// Only structs are supported so return an empty result if the passed object
// isn't a struct
if typ.Kind() != reflect.Struct {
fmt.Printf("%v type can't have attributes inspected\n", typ.Kind())
return attrs
}
// loop through the struct's fields and set the map
for i := 0; i < typ.NumField(); i++ {
p := typ.Field(i)
if !p.Anonymous {
attrs[p.Name] = p.Type
}
}
return attrs
}
import(
"fmt"
"reflect"
)
func main(){
// iterate through the attributes of a Data Model instance
for name, mtype := range attributes(&Dish{}) {
fmt.Printf("Name: %s, Type %s\n", name, mtype.Name())
}
}
// Data Model
type Dish struct {
Id int
Name string
Origin string
Query func()
}
// Example of how to use Go's reflection
// Print the attributes of a Data Model
func attributes(m interface{}) (map[string]reflect.Type) {
typ := reflect.TypeOf(m)
// if a pointer to a struct is passed, get the type of the dereferenced object
if typ.Kind() == reflect.Ptr{
typ = typ.Elem()
}
// create an attribute data structure as a map of types keyed by a string.
attrs := make(map[string]reflect.Type)
// Only structs are supported so return an empty result if the passed object
// isn't a struct
if typ.Kind() != reflect.Struct {
fmt.Printf("%v type can't have attributes inspected\n", typ.Kind())
return attrs
}
// loop through the struct's fields and set the map
for i := 0; i < typ.NumField(); i++ {
p := typ.Field(i)
if !p.Anonymous {
attrs[p.Name] = p.Type
}
}
return attrs
}
希望本文所述對(duì)大家的Go語(yǔ)言程序設(shè)計(jì)有所幫助。
