我需要编写一个可以将对象存储为 gobjects 的通用函数。
func hash_store(data map[string]string) {
//initialize a *bytes.Buffer
m := new(bytes.Buffer)
//the *bytes.Buffer satisfies the io.Writer interface and can
//be used in gob.NewEncoder()
enc := gob.NewEncoder(m)
//gob.Encoder has method Encode that accepts data items as parameter
enc.Encode(data)
//the bytes.Buffer type has method Bytes() that returns type []byte,
//and can be used as a parameter in ioutil.WriteFile()
err := ioutil.WriteFile("dep_data", m.Bytes(), 0600)
if err != nil {
panic(err)
}
fmt.Printf("just saved all depinfo with %v\n", data)
n,err := ioutil.ReadFile("dep_data")
if err != nil {
fmt.Printf("cannot read file")
panic(err)
}
//create a bytes.Buffer type with n, type []byte
p := bytes.NewBuffer(n)
//bytes.Buffer satisfies the interface for io.Writer and can be used
//in gob.NewDecoder()
dec := gob.NewDecoder(p)
//make a map reference type that we'll populate with the decoded gob
//e := make(map[int]string)
e := make(map[string]string)
//we must decode into a pointer, so we'll take the address of e
err = dec.Decode(&e)
if err != nil {
fmt.Printf("cannot decode")
panic(err)
}
fmt.Println("after reading dep_data printing ",e)
}
在这个函数中,我知道要存储在 map[string]string 中的数据类型。但是我需要编写一个通用函数,其中我不知道数据类型,并且仍将其作为 gobject 存储在文件中。
一只甜甜圈
相关分类