[sample] the % notation [ %s!...! ] (Ruby)

percent_s.rb

#!/usr/bin/env ruby
# -*- coding: UTF-8 -*-

#
# $ ruby -v
# ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]
#
x = "xyz"


p %s!abc!
p %s"abc"
p %s#abc#
p %s$abc$
p %s%abc%
p %s&abc&
p %s'abc'
p %s(abc)
p %s)abc)
p %s*abc*
p %s+abc+
p %s,abc,
p %s-abc-
p %s.abc.
p %s/abc/
p %s:abc:
p %s;abc;
p %s<abc>
p %s=abc=
p %s>abc>
p %s?abc?
p %s@abc@
p %s[abc]
p %s\abc\
p %s]abc]
p %s^abc^
p %s_abc_
p %s`abc`
p %s{abc}
p %s|abc|
p %s}abc}
p %s~abc~

p ( %s!abc! )
p ( %s"abc" )
p ( %s#abc# )
p ( %s$abc$ )
p ( %s%abc% )
p ( %s&abc& )
p ( %s'abc' )
p ( %s(abc) )
p ( %s)abc) )
p ( %s*abc* )
p ( %s+abc+ )
p ( %s,abc, )
p ( %s-abc- )
p ( %s.abc. )
p ( %s/abc/ )
p ( %s:abc: )
p ( %s;abc; )
p ( %s<abc> )
p ( %s=abc= )
p ( %s>abc> )
p ( %s?abc? )
p ( %s@abc@ )
p ( %s[abc] )
p ( %s\abc\ )
p ( %s]abc] )
p ( %s^abc^ )
p ( %s_abc_ )
p ( %s`abc` )
p ( %s{abc} )
p ( %s|abc| )
p ( %s}abc} )
p ( %s~abc~ )

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put_script.erb

#!/usr/bin/env ruby
# -*- coding: UTF-8 -*-

#
# $ ruby -v
# <%= RUBY_DESCRIPTION %>
#
x = "xyz"
<%
string = 'abc'
#string = 'abc#{x}'
#string = 'abc%s'
arg    = ""
#arg    = "% x"
q      = "s"
wrap1  = -> s { s }
wrap2  = -> s { "( #{s} )" }

put_code = -> wrap do
                (0x21..0x7e).map(&:chr)
                            .grep(/[_\W]/)
                            .map {|c| [c, {"(" => ")",
                                           "<" => ">",
                                           "[" => "]",
                                           "{" => "}"}[c] || c] }
                            .map {|c1,c2| "\%#{q}#{c1}#{string}#{c2}#{arg}" }
                            .map(&wrap)
                            .map {|s| "p #{s}" } * "\n"
              end
%>

<%= put_code.(wrap1) %>

<%= put_code.(wrap2) %>

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symbol.rb

#!/usr/bin/env ruby
# -*- coding: UTF-8 -*-

#
# $ ruby -v
# ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-linux]
#
x = "xyz"

p %s(symbol)      #=> :symbol
p :"symbol"       #=> :symbol
p :'symbol'       #=> :symbol

p %s(#{x})        #=> :"#{x}"
p :"#{x}"         #=> :xyz
p :'#{x}'         #=> :"#{x}"

p %s(%s)          #=> :"%s"
#p :'%s' % x       # undefined method `%' for :"%s":Symbol (NoMethodError)
#p :('%s' % x)     # Syntax Error
#p :"%s" % x       # undefined method `%' for :"%s":Symbol (NoMethodError)
#p :("%s" % x)     # Syntax Error

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