Ruby Hello World

helloworld

      = 1
      =  + 
      =   *  + 
      =    *  
      = 
      [      *(   +  )+  , 
             =     *    + , 
             =     *    +    -  , 
            , 
            =        +    ,
        *  +    +  , 
        *    -  *    +   +  , 
           , 
           + +  , 
            , 
        *    ,     + +  , 
        ]
puts      .map(&:chr).join

It would be interesting to know if there are particular versions of Ruby that don't treat special whitespace unicode points as valid identifier characters. I think a Ruby feature-request to make future versions of Ruby treat all unicode whitespace as real whitespace (i.e. assume it indicates a separation between two tokens but otherwise ignore it) would probably be helpful.

Nice! Here's a readability trick:

ruby -p -e '$_.gsub!(/ +/," ").gsub!(/\u00a0+/){|m| "v#{m.size}"}' < helloworld 

prints

v1 = 1
v2 = v1+v1
v3 = v2*v2+v1
v4 = v3*v2
v5 = 
 [v4 *(v3+v2)+v2, 
 v7 = v4*v4+v1, 
 v8 = v4*v4+v4-v2, 
 v8, 
 v7 = v7+v4,
 v4*v2+v4+v2, 
 v4*v4-v2*v4+v3+v2, 
 v7, 
 v7+v1+v2, 
 v8, 
 v4*v4, v4+v1+v2, 
 v4]
puts v5.map(&:chr).join