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kyrylo/rfe-2.1.rb

Created July 3, 2013 13:30
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Ruby for entertainment #2
Raw
rfe-2.1.rb
puts "#{ RUBY_VERSION } #{ RUBY_PATCHLEVEL }" #=> "1.8.7 370"
nil.frozen? #=> false
nil.freeze
nil.frozen? #=> false
69.frozen? #=> false
69.freeze
69.frozen? #=> false
6.9.frozen? #=> false
6.9.freeze
6.9.frozen? #=> false
:snow.frozen? #=> false
:snow.freeze
:snow.frozen? #=> false
Raw
rfe-2.2.rb
puts "#{ RUBY_VERSION } #{ RUBY_PATCHLEVEL }" => "1.9.3 392"
nil.frozen? #=> false
nil.freeze #=> nil
nil.frozen? #=> true
69.frozen? #=> false
69.freeze
69.frozen? #=> true
6.9.frozen? #=> false
6.9.freeze
6.9.frozen? #=> false
:snow.frozen? #=> false
:snow.freeze
:snow.frozen? #=> true
Raw
rfe-3.2.rb
puts "#{ RUBY_VERSION } #{ RUBY_PATCHLEVEL }" => "2.0.0 0"
nil.frozen? #=> false
nil.freeze #=> nil
nil.frozen? #=> true
69.frozen? #=> true
6.9.frozen? #=> true
:snow.frozen? #=> false
:snow.freeze
:snow.frozen? #=> true
@haileys

haileys commented Jul 3, 2013

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The difference between 1.9.3 and 2.0.0 is that on 64 bit platforms 2.0.0 uses flonums, which means Floats are immediate values just like nil, true, false, Fixnums, Symbols, etc.

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