Added Clear() to examples and code simplification

bot.go

@@ -451,7 +451,6 @@ func (bot *BotAPI) GetWebhookInfo() (WebhookInfo, error) {
 // GetUpdatesChan starts and returns a channel for getting updates.
 func (bot *BotAPI) GetUpdatesChan(config UpdateConfig) (updatesChannel, error) {
 	ch := make(chan Update, 100)
-	var updatesCh updatesChannel = ch
 
 	go func() {
 		for {
@@ -473,13 +472,12 @@ func (bot *BotAPI) GetUpdatesChan(config UpdateConfig) (updatesChannel, error) {
 		}
 	}()
 
-	return updatesCh, nil
+	return ch, nil
 }
 
 // ListenForWebhook registers a http handler for a webhook.
 func (bot *BotAPI) ListenForWebhook(pattern string) updatesChannel {
 	ch := make(chan Update, 100)
-	var updatesCh updatesChannel = ch
 
 	http.HandleFunc(pattern, func(w http.ResponseWriter, r *http.Request) {
 		bytes, _ := ioutil.ReadAll(r.Body)
@@ -490,7 +488,7 @@ func (bot *BotAPI) ListenForWebhook(pattern string) updatesChannel {
 		ch <- update
 	})
 
-	return updatesCh
+	return ch
 }
 
 // AnswerInlineQuery sends a response to an inline query.

bot_test.go

@@ -1,13 +1,14 @@
 package tgbotapi_test
 
 import (
-	"github.com/go-telegram-bot-api/telegram-bot-api"
 	"io/ioutil"
 	"log"
 	"net/http"
 	"os"
 	"testing"
 	"time"
+
+	"github.com/go-telegram-bot-api/telegram-bot-api"
 )
 
 const (
@@ -484,6 +485,12 @@ func ExampleNewBotAPI() {
 
 	updates, err := bot.GetUpdatesChan(u)
 
+	//If you need to clear all the updates when bot just started:
+	//Wait to gather all the new updates (choose the time conveniently)
+	time.Sleep(time.Millisecond * 500)
+	//discard all the updates preventing the spam after your server has been down
+	updates.Clear()
+
 	for update := range updates {
 		if update.Message == nil {
 			continue