// peekStackHandler returns the peek of the Stack without modifying it.
func (c *Conn) peekStackHandler(w http.ResponseWriter, r *http.Request, stack *pila.Stack) {
var element pila.Element
element.Value = stack.Peek()
stack.Read(c.opDate)
log.Println(r.Method, r.URL, http.StatusOK, element.Value)
w.Header().Set("Content-Type", "application/json")
// Do not check error as we consider our element
// suitable for a JSON encoding.
b, _ := element.ToJSON()
w.Write(b)
}
