如何初始化结构域

Question

How can to initialize any fields in golang types? For example:

type MyType struct {
    Field string = "default" 
} 

Answer 1

You can't have "default" values like that, you can either create a default "constructor" function that will return the defaults or simply assume that an empty / zero value is the "default".

type MyType struct {
    Field string
} 

func New(fld string) *MyType {
    return &MyType{Field: fld}
}

func Default() *MyType {
    return &MyType{Field: "default"}
}

Also I highly recommend going through Effective Go.