Numeric class

[corbaque]

Numeric class
by corbaque
Dec 2 2006

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I've creat this script for simplify my codes, for exemple :

Code:

angle = ((((Math.sqrt(x) * (i * Math::PI / 180)) * 180 / Math::PI) * 10000).to_i / 10000.0

to

Code:

angle = (x.sqrt * i.to_r).to_d.trunc_at(5)

(It's not a quote, just an exemple)

Add this script before main, name it "Numeric" :

Code:

#===================================
# Add at Numeric's class
#---------------------------------------------------------------
# Creat by Corbaque 02 / 12 / 2006
#---------------------------------------------------------------
# => degre => radian
# => radian => degree
# => square root
# => truncate at x after point
# Directly on number
# like this :
## 180.to_r #=> 3.14159265358979
## 3.14159265358979.to_d #=> 180
## 25.sqrt #=> 5
## 120.2522.trunc_at(2) #=> 120.25
#--------------------------------------------------------------
# Version 1.1
#===================================
class Numeric
  #-------------------------------------------------------------
  # Degree to Radian
  #- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Exemple :
  # 165.to_r
  # (256 * 526 * Math:tongue.gifI / 2546).to_r
  # -141.2564.to_r
  #-------------------------------------------------------------
  def to_r
    self * Math::PI / 180
  end
  #-------------------------------------------------------------
  # Radian to Degree
  #- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Exemple :
  # 2.54669572.to_d
  # (659 * Math:tongue.gifI / 1626).to_d
  # -62.4545.to_d
  #-------------------------------------------------------------
  def to_d
    self * 180 / Math::PI
  end
  #-------------------------------------------------------------
  # Square root
  #- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Exemple :
  # 25.sqrt
  # (36 + 42).sqrt
  #-------------------------------------------------------------
  def sqrt
    self**0.5
  end
  #-------------------------------------------------------------
  # Truncate at
  #- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # x = Numbers of figure after the point
  #- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  # Exemple :
  # 120.2522.trunc_at(2) #=> 120.25
  # 120.2522.trunc_at(-2) #=> 100.0
  #-------------------------------------------------------------
  def trunc_at(x)
    (self * (10.0 ** x)).to_i / (10.0 ** x)
  end
end

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