Time for an 2014 update…

Task/Temperature-conversion/AutoHotkey/temperature-conversion.ahk

@@ -0,0 +1,17 @@
+MsgBox, % "Kelvin:`t`t 21.00 K`n"
+        . "Celsius:`t`t" kelvinToCelsius(21) " C`n"
+        . "Fahrenheit:`t" kelvinToFahrenheit(21) " F`n"
+        . "Rankine:`t`t" kelvinToRankine(21) " R`n"
+
+kelvinToCelsius(k)
+{
+    return, round(k - 273.15, 2)
+}
+kelvinToFahrenheit(k)
+{
+    return, round(k * 1.8 - 459.67, 2)
+}
+kelvinToRankine(k)
+{
+    return, round(k * 1.8, 2)
+}

Task/Temperature-conversion/Objeck/temperature-conversion.objeck

@@ -1,4 +1,4 @@
-class Temperature {
+class Temperature {
   function : Main(args : String[]) ~ Nil {
     k := System.IO.Console->ReadString()->ToFloat();
     c := KelvinToCelsius(k);

Task/Temperature-conversion/PicoLisp/temperature-conversion-1.l

@@ -0,0 +1,12 @@
+(scl 2)
+
+(de convertKelvin (Kelvin)
+   (for X
+      (quote
+         (K . prog)
+         (C (K) (- K 273.15))
+         (F (K) (- (*/ K 1.8 1.0) 459.67))
+         (R (K) (*/ K 1.8 1.0)) )
+      (tab (-3 8)
+         (car X)
+         (format ((cdr X) Kelvin) *Scl) ) ) )

Task/Temperature-conversion/PicoLisp/temperature-conversion-2.l

@@ -0,0 +1 @@
+(convertKelvin 21.0)

Task/Temperature-conversion/Ruby/temperature-conversion-1.rb

@@ -0,0 +1,47 @@
+module TempConvert
+
+  FROM_TEMP_SCALE_TO_K =
+  {'kelvin'     => lambda{|t| t},
+   'celsius'    => lambda{|t| t + 273.15},
+   'fahrenheit' => lambda{|t| (t + 459.67) * 5/9.0},
+   'rankine'    => lambda{|t| t * 5/9.0},
+   'delisle'    => lambda{|t| 373.15 - t * 2/3.0},
+   'newton'     => lambda{|t| t * 100/33.0 + 273.15},
+   'reaumur'    => lambda{|t| t * 5/4.0 + 273.15},
+   'roemer'     => lambda{|t| (t - 7.5) * 40/21.0 + 273.15}}
+
+  TO_TEMP_SCALE_FROM_K =
+  {'kelvin'     => lambda{|t| t},
+   'celsius'    => lambda{|t| t - 273.15},
+   'fahrenheit' => lambda{|t| t * 9/5.0 - 459.67},
+   'rankine'    => lambda{|t| t * 9/5.0},
+   'delisle'    => lambda{|t| (373.15 - t) * 3/2.0},
+   'newton'     => lambda{|t| (t - 273.15) * 33/100.0},
+   'reaumur'    => lambda{|t| (t - 273.15) * 4/5.0},
+   'roemer'     => lambda{|t| (t - 273.15) * 21/40.0 + 7.5}}
+
+  SUPPORTED_SCALES = FROM_TEMP_SCALE_TO_K.keys.join('|')
+
+  def self.method_missing(meth, *args, &block)
+    if valid_temperature_conversion?(meth) then
+      convert_temperature(meth, *args)
+    else
+      super
+    end
+  end
+
+  def self.respond_to_missing?(meth, include_private = false)
+    valid_temperature_conversion?(meth) || super
+  end
+
+  def self.valid_temperature_conversion?(meth)
+    !!(meth.to_s =~ /(#{SUPPORTED_SCALES})_to_(#{SUPPORTED_SCALES})/)
+  end
+
+  def self.convert_temperature(meth, temp)
+    from_scale, to_scale = meth.to_s.split("_to_")
+    return temp.to_f if from_scale == to_scale # no kelvin roundtrip
+    TO_TEMP_SCALE_FROM_K[to_scale].call(FROM_TEMP_SCALE_TO_K[from_scale].call(temp)).round(2)
+  end
+
+end

Task/Temperature-conversion/Ruby/temperature-conversion-2.rb

@@ -0,0 +1,11 @@
+TempConvert.kelvin_to_celsius 100 #=> -173.15
+TempConvert.kelvin_to_fahrenheit 100 #=> -279.67
+TempConvert.kelvin_to_rankine 100 #=> 180.0
+TempConvert.kelvin_to_delisle 100 #=> 409.73
+TempConvert.kelvin_to_newton 100 #=> -57.14
+TempConvert.kelvin_to_reaumur 100 #=> -138.52
+TempConvert.kelvin_to_roemer 100 #=> -83.4
+
+TempConvert.newton_to_celsius 100 #=> 303.03
+TempConvert.newton_to_fahrenheit 100 #=> 577.45
+# All 64 combinations possible