wnuqui

class A
  def b
    data = [1, 2, 3]
    def data.foo!
      self.sample
    end
    data
  end
end

wnuqui

class A
  def self.constant
    [1, 2, 3]
  end

  B = constant and nil
end

wnuqui

i = "1i"

i.to_i # => 1
Integer(i) # => ArgumentError: invalid value for Integer(): "1i"


f = "1.2f"

f.to_f # => 1.2
Float(f) # => ArgumentError: invalid value for Float(): "1.2f"

wnuqui

# send following line to irb and see the result
a = 1, b = 2*5

# perhaps this is better
a = 1, (b = 2*5)

wnuqui

# _thanks_ to where I saw this
task :prompt do
   STDOUT.puts "Prompt? "
   prompt = STDIN.gets.chomp
   STDOUT.puts "Cool! Prompt is #{prompt}."
end

wnuqui

# ruby is 1.9.2p290
"Foo\n".gsub('\n', '') # => "Foo\n"
"Foo\n".gsub("\n", '') # => "Foo"
"Foo\n".gsub("\n", '') # => "Foo"
"Foo\n".gsub('\n', '') # => "Foo\n"
'Foo\n'.gsub("\n", '') # => "Foo\\n"
'Foo\n'.gsub('\n', '') # => "Foo"

# pastie here: http://pastie.org/3924412

wnuqui

# try running a rake task like
RAILS_ENV=test ANOTHER=imaginary rake foo:bar

# and run
rake foo:bar RAILS_ENV=test ANOTHER=imaginary

# both run right?

# now do this
ruby -e "system 'rake foo:bar RAILS_ENV=test ANOTHER=imaginary'"

wnuqui

class Foo
  module Bar
    def self.test
      puts "Test!"
    end
  end
end

# Bar namespaced to Foo for the "test" util method!
# what do you think?

wnuqui

class Foo
  def to_s
    "I am friendly. You can debug here thru formatted string."
  end
end

foo = Foo.new # "I am friendly. You can debug here thru formatted string."
foo # "I am friendly. You can debug here thru formatted string."

# alternatively

wnuqui

STDOUT << URI.escape(create(model.to_sym, options).to_json)