change ~ to \A in regexes

lib/slanger/channel.rb

@@ -17,7 +17,7 @@ class Channel
 
     class << self
       def from channel_id
-        klass = channel_id[/^presence-/] ? PresenceChannel : Channel
+        klass = channel_id[/\Apresence-/] ? PresenceChannel : Channel
 
         klass.lookup(channel_id) || klass.create(channel_id: channel_id)
       end
@@ -81,11 +81,11 @@ def send_client_message(message)
     # Send an event received from Redis to the EventMachine channel
     # which will send it to subscribed clients.
     def dispatch(message, channel)
-      push(message.to_json) unless channel =~ /^slanger:/
+      push(message.to_json) unless channel =~ /\Aslanger:/
     end
 
     def authenticated?
-      channel_id =~ /^private-/ || channel_id =~ /^presence-/
+      channel_id =~ /\Aprivate-/ || channel_id =~ /\Apresence-/
     end
   end
 end

lib/slanger/handler.rb

@@ -28,9 +28,9 @@ def onmessage(msg)
 
       msg['data'] = JSON.parse(msg['data']) if msg['data'].is_a? String
 
-      event = msg['event'].gsub(/^pusher:/, 'pusher_')
+      event = msg['event'].gsub(/\Apusher:/, 'pusher_')
 
-      if event =~ /^client-/
+      if event =~ /\Aclient-/
         msg['socket_id'] = connection.socket_id
         Channel.send_client_message msg
       elsif respond_to? event, true
@@ -106,7 +106,7 @@ def valid_app_key? app_key
     end
 
     def subscription_klass channel_id
-      klass = channel_id.match(/^(private|presence)-/) do |match|
+      klass = channel_id.match(/\A(private|presence)-/) do |match|
         Slanger.const_get "#{match[1]}_subscription".classify
       end
 

lib/slanger/presence_channel.rb

@@ -15,7 +15,7 @@ class PresenceChannel < Channel
 
     # Send an event received from Redis to the EventMachine channel
     def dispatch(message, channel)
-      if channel =~ /^slanger:/
+      if channel =~ /\Aslanger:/
         # Messages received from the Redis channel slanger:*  carry info on
         # subscriptions. Update our subscribers accordingly.
         update_subscribers message