From 45de351fea38898ad2cab3731b0851c133efc803 Mon Sep 17 00:00:00 2001
From: Louis Chatriot <louis.chatriot@gmail.com>
Date: Thu, 16 May 2013 17:10:08 +0200
Subject: [PATCH] Update README.md

---
 README.md | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index bc20685..9f37698 100644
--- a/README.md
+++ b/README.md
@@ -101,9 +101,14 @@ db.findOne({ _id: 'id1' }, function (err, doc) {
 db.update({ planet: 'Jupiter' }, { planet: 'Pluton'}, {}, function (err, numReplaced) {
   // numReplaced = 1
   // The doc #3 has been replaced by { _id: 'id3', planet: 'Pluton' }
-  // Note that the _id has not been modified
+  // Note that the _id is kept unchanged, and the document has been replaced
+  // (the 'system' field is not here anymore)
 });
 
+db.update({ system: 'solar' }, { $set: { system: 'solar system' } }, { multi: true }, function (err, numResult) {
+  // numResult = 3
+  // Field 'system' on Mars, Earth, Jupiter now has value 'solar system'
+});
 ```