diff --git a/Socket.IO-Client-Swift.xcodeproj/xcshareddata/xcschemes/SocketIO-Mac.xcscheme b/Socket.IO-Client-Swift.xcodeproj/xcshareddata/xcschemes/SocketIO-Mac.xcscheme
index 967b6f7..4b74905 100644
--- a/Socket.IO-Client-Swift.xcodeproj/xcshareddata/xcschemes/SocketIO-Mac.xcscheme
+++ b/Socket.IO-Client-Swift.xcodeproj/xcshareddata/xcschemes/SocketIO-Mac.xcscheme
@@ -37,10 +37,10 @@
       </BuildActionEntries>
    </BuildAction>
    <TestAction
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      buildConfiguration = "Debug">
+      shouldUseLaunchSchemeArgsEnv = "YES">
       <Testables>
          <TestableReference
             skipped = "NO">
@@ -62,15 +62,18 @@
             ReferencedContainer = "container:Socket.IO-Client-Swift.xcodeproj">
          </BuildableReference>
       </MacroExpansion>
+      <AdditionalOptions>
+      </AdditionalOptions>
    </TestAction>
    <LaunchAction
+      buildConfiguration = "Debug"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Debug"
       ignoresPersistentStateOnLaunch = "NO"
       debugDocumentVersioning = "YES"
+      debugServiceExtension = "internal"
       allowLocationSimulation = "YES">
       <MacroExpansion>
          <BuildableReference
@@ -85,10 +88,10 @@
       </AdditionalOptions>
    </LaunchAction>
    <ProfileAction
+      buildConfiguration = "Release"
       shouldUseLaunchSchemeArgsEnv = "YES"
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
-      buildConfiguration = "Release"
       debugDocumentVersioning = "YES">
       <MacroExpansion>
          <BuildableReference
diff --git a/SocketIOClientSwift/SocketAckEmitter.swift b/SocketIOClientSwift/SocketAckEmitter.swift
index c456d6e..341896a 100644
--- a/SocketIOClientSwift/SocketAckEmitter.swift
+++ b/SocketIOClientSwift/SocketAckEmitter.swift
@@ -27,22 +27,18 @@ import Foundation
 
 public class SocketAckEmitter: NSObject {
     unowned let socket: SocketIOClient
-    var ackNum: Int
-    
-    public subscript(items: AnyObject...) -> Bool {
-        socket.emitAck(ackNum, withItems: items)
-        
-        return true
-    }
-    
-    public subscript(items: [AnyObject]) -> NSString {
-        socket.emitAck(ackNum, withItems: items)
-        
-        return "Done"
-    }
+    let ackNum: Int
     
     init(socket: SocketIOClient, ackNum: Int) {
         self.socket = socket
         self.ackNum = ackNum
     }
+    
+    public func ackWith(items: [AnyObject]) {
+        socket.emitAck(ackNum, withItems: items)
+    }
+}
+
+public func <-(lhs: SocketAckEmitter?, rhs: [AnyObject]) {
+    lhs?.ackWith(rhs)
 }
\ No newline at end of file
diff --git a/SocketIOClientSwift/SocketTypes.swift b/SocketIOClientSwift/SocketTypes.swift
index 09fb67a..14eaf6a 100644
--- a/SocketIOClientSwift/SocketTypes.swift
+++ b/SocketIOClientSwift/SocketTypes.swift
@@ -24,6 +24,7 @@
 
 import Foundation
 
+infix operator <- {}
 public typealias AckCallback = ([AnyObject]) -> Void
 public typealias NormalCallback = ([AnyObject], SocketAckEmitter?) -> Void
 public typealias OnAckCallback = (timeoutAfter: UInt64, callback: AckCallback) -> Void