Update caching example in README

README.md

@@ -179,22 +179,19 @@ gem "faraday_middleware"
 In your Ruby code:
 
 ```ruby
-class MyCache
-  def initialize
-    @cache = {}
-  end
-
-  def write(key, value)
-    @cache[key] = value
+class MyCache < Hash
+  def read(key)
+    if cached = self[key]
+      Marshal.load(cached)
+    end
   end
 
-  def read(key)
-    @cache[key]
+  def write(key, data)
+    self[key] = Marshal.dump(data)
   end
 
-  def fetch(key, &block)
-    return value = read(key) if value.nil?
-    write key, yield
+  def fetch(key)
+    read(key) || yield.tap { |data| write(key, data) }
   end
 end
 

examples/twitter-search/app.rb

@@ -12,31 +12,30 @@ def on_complete(env)
   end
 end
 
-class MyCache
-  def initialize
-    @cache = {}
-  end
-
-  def write(key, value)
-    @cache[key] = value
+class MyCache < Hash
+  def read(key)
+    if cached = self[key]
+      Marshal.load(cached)
+    end
   end
 
-  def read(key)
-    @cache[key]
+  def write(key, data)
+    self[key] = Marshal.dump(data)
   end
 
-  def fetch(key, &block)
-    return value = read(key) if value.nil?
-    write key, yield
+  def fetch(key)
+    read(key) || yield.tap { |data| write(key, data) }
   end
 end
 
 $cache = MyCache.new
 
 # Initialize API
 Her::API.setup :base_uri => "http://search.twitter.com" do |builder|
-  builder.swap Her::Middleware::FirstLevelParseJSON, TwitterSearchParser
+  builder.use Faraday::Request::UrlEncoded
   builder.use FaradayMiddleware::Caching, $cache
+  builder.use TwitterSearchParser
+  builder.use Faraday::Adapter::NetHttp
 end
 
 # Define classes
@@ -49,6 +48,6 @@ def self.search(query, attrs={})
 end
 
 get "/" do
-  @tweets = Tweet.search("github", :rpp => 30)
+  @tweets = Tweet.search("justin bieber", :rpp => 30)
   haml :index
 end