radex · radex · Dec 10, 2015 · Nov 20, 2015 · Dec 10, 2015 · Dec 10, 2015
diff --git a/README.md b/README.md
@@ -23,11 +23,13 @@ SwiftyTimer uses closures instead of target/selector/userInfo.
 You can specify time intervals with intuitive [Ruby on Rails](http://rubyonrails.org)-like helpers:
 
 ```swift
+100.milliseconds
 1.second
 2.5.seconds
 5.seconds
 10.minutes
 1.hour
+2.days
 ```
 
 You can pass method references instead of closures:

diff --git a/Src/SwiftyTime.swift b/Src/SwiftyTime.swift
@@ -0,0 +1,54 @@
+//
+// SwiftyTimer
+//
+// Copyright (c) 2015 Oktawian Chojnacki and Radosław Pietruszewski
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+//
+
+import Foundation
+
+private let milliDivider: Double    = 1000
+private let secondsInMinute: Double = 60
+private let minutesInHour: Double   = 60
+private let hoursInDay: Double      = 24
+
+extension Double {
+
+    private func assertOneOrLess(value: Double) -> Double {
+        assert(self <= 1, "🤓 Use plural property for numbers above 1.")
+        return value
+    }
+
+    public var millisecond: NSTimeInterval  { return assertOneOrLess(milliseconds) }
+    public var milliseconds: NSTimeInterval { return self / milliDivider }
+    public var ms: NSTimeInterval           { return milliseconds }
+
+    public var second: NSTimeInterval       { return assertOneOrLess(seconds) }
+    public var seconds: NSTimeInterval      { return self }
+
+    public var minute: NSTimeInterval       { return assertOneOrLess(minutes) }
+    public var minutes: NSTimeInterval      { return self * secondsInMinute }
+
+    public var hour: NSTimeInterval         { return assertOneOrLess(hours)}
+    public var hours: NSTimeInterval        { return minutes * minutesInHour }
+
+    public var day: NSTimeInterval          { return assertOneOrLess(days) }
+    public var days: NSTimeInterval         { return hours * hoursInDay }
+}
diff --git a/Src/SwiftyTimer.swift b/Src/SwiftyTimer.swift
@@ -89,12 +89,4 @@ extension NSTimer {
     }
 }
 
-extension Double {
-    public var ms:      NSTimeInterval { return self / 1000 }
-    public var second:  NSTimeInterval { return self }
-    public var seconds: NSTimeInterval { return self }
-    public var minute:  NSTimeInterval { return self * 60 }
-    public var minutes: NSTimeInterval { return self * 60 }
-    public var hour:    NSTimeInterval { return self * 3600 }
-    public var hours:   NSTimeInterval { return self * 3600 }
-}
+
diff --git a/Tests/SwiftyTimerTests.xcodeproj/project.pbxproj b/Tests/SwiftyTimerTests.xcodeproj/project.pbxproj
@@ -7,11 +7,13 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
+		1A4561A11C19D12600313D20 /* SwiftyTime.swift in Sources */ = {isa = PBXBuildFile; fileRef = 1A4561A01C19D12600313D20 /* SwiftyTime.swift */; };
 		6EE9C1591B00BB5B00D6B91C /* main.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6EE9C1581B00BB5B00D6B91C /* main.swift */; };
 		6EE9C1741B00BBB700D6B91C /* SwiftyTimer.swift in Sources */ = {isa = PBXBuildFile; fileRef = 6EE9C1731B00BBB700D6B91C /* SwiftyTimer.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
+		1A4561A01C19D12600313D20 /* SwiftyTime.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; name = SwiftyTime.swift; path = ../../Src/SwiftyTime.swift; sourceTree = "<group>"; };
 		6EE9C1531B00BB5B00D6B91C /* SwiftyTimerTests.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = SwiftyTimerTests.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		6EE9C1571B00BB5B00D6B91C /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		6EE9C1581B00BB5B00D6B91C /* main.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = main.swift; sourceTree = "<group>"; };
@@ -48,6 +50,7 @@
 		6EE9C1551B00BB5B00D6B91C /* SwiftyTimerTests */ = {
 			isa = PBXGroup;
 			children = (
+				1A4561A01C19D12600313D20 /* SwiftyTime.swift */,
 				6EE9C1731B00BBB700D6B91C /* SwiftyTimer.swift */,
 				6EE9C1581B00BB5B00D6B91C /* main.swift */,
 				6EE9C1561B00BB5B00D6B91C /* Supporting Files */,
@@ -130,6 +133,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				1A4561A11C19D12600313D20 /* SwiftyTime.swift in Sources */,
 				6EE9C1591B00BB5B00D6B91C /* main.swift in Sources */,
 				6EE9C1741B00BBB700D6B91C /* SwiftyTimer.swift in Sources */,
 			);

diff --git a/Tests/SwiftyTimerTests/main.swift b/Tests/SwiftyTimerTests/main.swift
@@ -14,6 +14,10 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         assert(1.2.seconds == 1.2)
         assert(1.5.minutes == 90.0)
         assert(1.5.hours == 5400.0)
+        assert(1.3.milliseconds == 0.0013)
+        assert(0.5.day == 43_200 )
+        assert(1.day == 86_400 )
+        assert(2.days == 172_800)
         test2()
     }