From 0136d7c96fccc5f99d5aefc98510d0383df3fd59 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gr=C3=A9gory=20Horion?= <greg2502@gmail.com>
Date: Mon, 19 May 2014 10:59:27 -0700
Subject: [PATCH] update the Readme

wrote an exemple with the "with()"
---
 README.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/README.md b/README.md
index 8168e46..dca514a 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,18 @@ mail.deliver some_message
 
 mail.use :null # switch back to the null implementation.
 ```
+Sometimes you'll want to use an implementation for the duration of a block:
+
+```
+mailer = Mailer.new
+mailer.register :snail_mail, SnailMail.new
+
+mailer.with(:smtp) do |smtp_mailer|
+  smtp_mailer.deliver some_message
+end
+
+mailer.deliver some_message_with_snail_mail
+```
 
 These objects are useful when you have an interaction that needs
 to happen but implementations can vary widely. You can also use this