s.capticalize 問題

twf_cc

小弟在 Cygwin下, ruby 版本 1.86 , 運行這個 String method 說沒定義,
回到 Linux 下, ruby 1.84 也一樣, 但書上卻有這個方法... swapcase 則
沒問題。
[victor@localhost ~]$ ruby --version
ruby 1.8.4 (2005-12-24) [i386-linux]
[victor@localhost ~]$ ruby -e 's = ARGV[0] ; puts s.swapcase' uNIX
Unix
[victor@localhost ~]$ ruby -e 's = ARGV[0] ; puts s.capticalize' uNIX
-e:1: undefined method `capticalize' for "uNIX":String (NoMethodError)
[victor@localhost ~]$

Why?????? 高手可解答嗎？

twf_cc

更正寫法 , Ruby 文件是這樣的,新手莫怪
String#capticalize 不存在的方法,但 Ruby Programing 卻有這個方法,
其實是那個錯了？

2gua

C:\>ri swapcase
-------------------------------------------------------- String#swapcase
     str.swapcase   => new_str
------------------------------------------------------------------------
     Returns a copy of _str_ with uppercase alphabetic characters
     converted to lowercase and lowercase characters converted to
     uppercase.

        "Hello".swapcase          #=> "hELLO"
        "cYbEr_PuNk11".swapcase   #=> "CyBeR_pUnK11"

twf_cc

原帖由 lujx 于 2007-7-3 06:24 发表
C:\>ri swapcase
-------------------------------------------------------- String#swapcase
     str.swapcase   => new_str
------------------------------------------------------------------------ ...

是沒這個method 的問題,不是method 的工作方式....
[victor@localhost ~]$ ruby -e 'puts "uNiX OpERating Os".swapcase'
UnIx oPerATING oS
[victor@localhost ~]$ ruby -e 'puts "uNiX OpERating Os".capticalize'
-e:1: undefined method `capticalize' for "uNiX OpERating Os":String (NoMethodError)
[victor@localhost ~]$

twf_cc

原帖由 lujx 于 2007-7-3 06:24 发表
C:\>ri swapcase
-------------------------------------------------------- String#swapcase
     str.swapcase   => new_str
------------------------------------------------------------------------ ...

是沒這個method 的問題,不是method 的工作方式....
[victor@localhost ~]$ ruby -e 'puts "uNiX OpERating Os".swapcase'
UnIx oPerATING oS
[victor@localhost ~]$ ruby -e 'puts "uNiX OpERating Os".capticalize'
-e:1: undefined method `capticalize' for "uNiX OpERating Os":String (NoMethodError)
[victor@localhost ~]$

dz902

好像是因为拼写错误。

是 capitalize 吧？

2gua

C:\>ruby -e 'puts "uNiX OpERating Os".swapcase'
UnIx oPerATING oS

C:\>

2gua

C:\>ri String.capitalize
------------------------------------------------------ String#capitalize
     str.capitalize   => new_str
------------------------------------------------------------------------
     Returns a copy of _str_ with the first character converted to
     uppercase and the remainder to lowercase.

        "hello".capitalize    #=> "Hello"
        "HELLO".capitalize    #=> "Hello"
        "123ABC".capitalize   #=> "123abc"



C:\>ri capticalize
Nothing known about capticalize

C:\>

DeceitLei

[victor@localhost ~]$ ruby -e 's = ARGV[0] ; puts s.capitalize' uNIX
Unix

你拼错了而已