 @methodOf Number#
 @returns {Number} The absolute value of the number.
 ###
-Number::abs = () ->
-  Math.abs(this)
 
 ###*
 Returns the mathematical ceiling of this number.

@methodOf Number#
@returns {Number} The number truncated to the nearest integer of less than or equal value.
###
Number::floor = ->
  Math.floor(this)

###*
Returns this number rounded to the nearest integer.

@returns {Number} A number toward target by the ratio
###
Number::approachByRatio = (target, ratio) ->
  @approach(target, this * ratio)

###*
Returns a number that is closer to the target angle by the delta.
