Removing all literals from Ruby

gistfile1.md

Literals are ugly. Let's remove them.

True/false:

2.0.0p0 :001 > !Date
=> false
2.0.0p0 :002 > require Date.to_s.downcase
=> true

Integers and floats:

2.0.0p0 :003 > Date.civil.year
=> -4712 
2.0.0p0 :004 > Date.civil.year.to_f
=> -4712.0
#and the others are left as an exercise for the reader

Hashes:

2.0.0p0 :005 > Date._jisx0301(self.methods.first.to_s)
=> {}

Arrays:

2.0.0p0 :006 > Array(Date._jisx0301(self.methods.first.to_s))
=> []

Nil:

2.0.0p0 :007 > Date._jisx0301(self.methods.first.to_s).default_proc
=> nil    

Strings/symbols:

2.0.0p0 :008 > method(:using).inspect[(Date.civil.year - Date.civil.year).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ]
=> "a"
2.0.0p0 :009 > method(:using).inspect[(Date.civil.year - Date.civil.year).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ].succ
=> "b" 
2.0.0p0 :010 > method(:using).inspect[(Date.civil.year - Date.civil.year).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ].to_sym
=> :a
#and the others are left as an exercise for the reader

Ranges:

2.0.0p0 :011 > ObjectSpace.each_object(eval method(:extend).inspect[(Date.civil.year.-(Date.civil.year)).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ].upcase + method(:include).inspect[(Date.civil.year.-(Date.civil.year)).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ] +  method(:extend).inspect[(Date.civil.year.-(Date.civil.year)).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ] + method(:include).inspect[(Date.civil.year.-(Date.civil.year)).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ].succ.succ.succ.succ.succ.succ + method(:include).inspect[(Date.civil.year.-(Date.civil.year)).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ].succ.succ.succ.succ).map.first
=> 1..-1

Unfortunately, ranges aren't mutable. I guess you could construct a string and eval it.

Lambdas:

#trivial, but let's do it anyway
2.0.0p0 :011 > def add_to_self(a); a + a; end
=> nil
2.0.0p0 :012 > method(:add_to_self).to_proc[Date.civil.year.denominator]
=> 2

Regexen:

#trivial, but let's do it anyway
2.0.0p0 :013 > Regexp.compile(method(:using).inspect[(Date.civil.year - Date.civil.year).succ.succ.succ.succ.succ.succ.succ.succ.succ.succ.succ]) =~ "abc"
=> 0

Rubinius.

rubinius-2.0.0.rc1 :001 > require Date.to_s.downcase
NameError: Missing or uninitialized constant: Date
   from Module(Class)#const_missing at kernel/common/module.rb:438
   from { } in Object#irb_binding at (irb):1
   from Rubinius::BlockEnvironment#call_on_instance at kernel/common/block_environment.rb:57