 
     4.9.floor()
     # => 4
-    
+
     4.2.floor()
     # => 4
-    
+
     (-1.2).floor()
     # => -2
 


    2.even()
    # => true
    
    3.even()
    # => false
    
    0.even()
    # => true      

@name even
@methodOf Number#


    255.approach(0, 5)
    # => 250

    5.approach(0, 10)
    # => 0

@name approach
@methodOf Number#
@returns {Number} A number maxDelta toward target
###
Number::approach = (target, maxDelta) ->
  (target - this).clamp(-maxDelta, maxDelta) + this

