Ruby
塼ȥꥢ: ɽ

RubyǤɽȤΤ¿ѤޤɽȤΤʸΥѥɽΤǤ롼ˤäʸõȤΥ롼ɽΤȹͤƤ褤Ǥ礦ȤС"FOO"ǻϤޤä"R"ǽʸפȤ褦ʥ롼ǤʤߤˤΡ֥롼פɽɽϰʲΤ褦ˤʤޤ

/^FOO.*R$/

RubyǤ//˰Ϥޤ줿ʬɽǤ^ϡƬס$̣.*Ǥդʸ0İʾ¤Ӥ̣ޤ

ǤϡɽΥ롼νޤ礦ɽˤϾ褦̤ʰ̣ʸĤޤޤ򤢤Ƥޤ

[ ]

ʸϰϻꡥ[a-z]azޤǤΤ줫

\w

ѿ[0-9A-Za-z_]Ʊ

\W

ѿ

\s

ʸ[ \t\n\r\f]Ʊ

\S

ʸ

\d

[0-9] Ʊ

\D

\b

춭ʸ(ϰϻ곰)

\B

춭ʸ

\b

(0x08)(ϰϻ)

*

ľɽ0ʾη֤

+

ľɽ1ʾη֤

{m,n}

ľɽm󤫤nη֤

?

ľɽ0ޤ1η֤

|

( )

ɽޤȤ

ʳ

ʸΤ

ȤС^f[a-z]+פϡfϤޤazޤǤʸη֤פǤꡤ"foobar""fool"ʤɤȰפޤΤפɽ(regular expression)ȸƤӤޤɽʸθλΩĤΤǡUNIXǤϤȻȤƤޤɽŪʤΤgrepȸƤФץǤ褯äˤʤäƤͤ⤤ΤǤϤʤǤ礦?

ɽȤˤĤ뤿ˡäȤץȤäƤߤޤ礦ʲΥץregx.rbȤ̾ǥ֤Ƽ¹ԤƤߤޤ

st = "\033[7m"
en = "\033[m"
 
while TRUE
   print "str> "
   STDOUT.flush
   str = gets
   break if not str
   str.chop!
   print "pat> "
   STDOUT.flush
   re = gets
   break if not re
   re.chop!
   str.gsub! /#{re}/, "#{st}\\&#{en}"
   print str, "\n"
end
print "\n"

ϺǽϤʸΤǡϤɽ˰פʬȿžɽץǤʲ˼¹򼨤ޤ

str> foobar
pat> ^fo+
foobar
^^^

# ºݤfooʬȿžƤ롥

Ƥߤޤ礦

str> abc012dbcd555
pat> \\d
abc012dbcd555
   ~~~    ~~~

ʬ褦ˤΥץʣΰײս򸡽ФǤ褦ˤʤäƤޤ

str> foozboozer
pat> f.*z
foozboozer
~~~~~~~~

Ǥɽf.*zפfoozǤϤʤfoozbooz˥ޥåƤޤ͡ɽȤΤϤĹפ֤褦ˤʤäƤ뤫Ǥ

ɽǤϤȤƤҤȤǤϰ̣ʬʤ褦ʥѥ񤯤ȤǤޤѥȤƤ򤤤Τޤ󡥤ޤŤꤹȸǤʤˤȤΤʬʤʤäƤޤ⤷ޤ󤬡

str> Wed Feb  7 08:58:04 JST 1996
pat> [0-9]+:[0-9]+(:[0-9]+)?
Wed Feb  7 08:58:04 JST 1996
           ~~~~~~~~

RubyΥץǤɽ`/'ǤäƵҤޤޤĤΥ᥽åɤʸɽ˼ưŪѴƤޤ

% ruby -le 'print "abcdef" =~ /d/' 
3
% ruby -le 'print "aaaaaa" =~ /d/'
nil

`=~'ɽӤԤ黻Ҥǡפ˰פ֤֤ޤ

ɤΤ褦ʥ᥽åɤɽ򰷤Ȥ뤫ϥե󥹥ޥ˥奢򻲾ȤƤ