globals/output_stream_names_no_parens.rb

tests/_examples/globals/output_stream_names_no_parens.rb in the metorex repository.

require "stringio"

captured = StringIO.new
$stdout = captured
$>.write "through $>\n"
$stdout = STDOUT
p captured.string
p $>.equal?($stdout)
p global_variables.include?(:$>)

p (Dir.glob("*", unknown_option: 1) rescue $!)
p Dir.glob("*", base: __dir__, flags: File::FNM_DOTMATCH).include?(".")

class String
  def shout = upcase + "!"
end
p Object.const_source_location(:String)
p "ready".shout

p case 3 when 1..5 then :low end
p begin 4 end

Output:

"through $>\n"
true
true
#<ArgumentError: unknown keyword: :unknown_option>
true
[]
"READY!"
:low
4