go-spew调试利器详解

s := "GoCN"
i := 123
spew.Dump(s, i) 
//-----
(string) (len=4) "GoCN"
(int) 123

type S struct {
 S2 *S2
 I  *int
}

type S2 struct {
 Str string
}

func main() {
 s := "GoCN"
 i := 2
 f := []float64{1.1, 2.2}
 m := map[string]int{"a": 1, "b": 2}
 e := errors.New("new error")
 ss := S{S2: &S2{Str: "xxx"}, I: &i}
 spew.Dump(s, i, f, m, e, ss)
}
//-----

(string) (len=4) "GoCN"
(int) 2
([]float64) (len=2 cap=2) {
 (float64) 1.1,
 (float64) 2.2
}
(map[string]int) (len=2) {
 (string) (len=1) "a": (int) 1,
 (string) (len=1) "b": (int) 2
}
(*errors.errorString)(0xc000010320)(new error)
(main.S) {
 S2: (*main.S2)(0xc000010330)({
  Str: (string) (len=3) "xxx"
 }),
 I: (*int)(0xc00001e1f0)(2)
}

u := &url.URL{Scheme: "https", Host: "gocn.vip"}
 req, err := http.NewRequestWithContext(context.Background(), "GET", u.String(), nil)
 if err != nil {
  panic(err)
 }
spew.Dump(req)
//-----
(*http.Request)(0xc000162000)({
 Method: (string) (len=3) "GET",
 URL: (*url.URL)(0xc000136090)(https://gocn.vip),
 Proto: (string) (len=8) "HTTP/1.1",
 ProtoMajor: (int) 1,
 ProtoMinor: (int) 1,
 Header: (http.Header) {
 },
 Body: (io.ReadCloser) <nil>,
 GetBody: (func() (io.ReadCloser, error)) <nil>,
 ContentLength: (int64) 0,
 TransferEncoding: ([]string) <nil>,
 Close: (bool) false,
 Host: (string) (len=8) "gocn.vip",
 Form: (url.Values) <nil>,
 PostForm: (url.Values) <nil>,
 MultipartForm: (*multipart.Form)(<nil>),
 Trailer: (http.Header) <nil>,
 RemoteAddr: (string) "",
 RequestURI: (string) "",
 TLS: (*tls.ConnectionState)(<nil>),
 Cancel: (<-chan struct {}) <nil>,
 Response: (*http.Response)(<nil>),
 ctx: (*context.emptyCtx)(0xc000020090)(context.Background)
})