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Update ch5-03-middleware.md

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修复5.3.3 示例代码
nil map panic: assignment to entry in nil map
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vgopher 2021-04-08 08:53:24 +08:00 committed by GitHub
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ch5-web/ch5-03-middleware.md
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@ -233,8 +233,10 @@ type Router struct {
mux map[string] http.Handler
}
func NewRouter() *Router{
return &Router{}
func NewRouter() *Router {
return &Router{
mux: make(map[string]http.Handler),
}
}
func (r *Router) Use(m middleware) {