casting-vs-calling

handle.go

http.Handle("/yolo2", http.HandlerFunc(Yolo))

main.go

package main

import (
    "fmt"
    "net/http"
)

type Lol struct{}

func (l *Lol) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintln(w, "LOL")
}

func main() {
    http.Handle("/lol", &Lol{})
    http.ListenAndServe(":3000", nil)
}

main2.go

package main

import (
    "fmt"
    "net/http"
)

func Yolo(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintln(w, "YOLO")
}

func main() {
    http.Handle("/yolo2", http.HandlerFunc(Yolo))
    http.ListenAndServe(":3000", nil)
}

main3.go

package main

import (
    "fmt"
    "net/http"
)

func Rofl(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintln(w, "ROFL")
}

func main() {
    http.HandleFunc("/yolo2", Yolo)
    http.ListenAndServe(":3000", nil)
}