Ruby 1.9:如何正确地对&小写的多字节字符串? [英] Ruby 1.9: how can I properly upcase & downcase multibyte strings?
问题描述
因此,马茨决定将红宝石1.9.1中的upcase
和downcase
限制为/[A-Z]/i
.
So matz made the decision to keep upcase
and downcase
limited to /[A-Z]/i
in ruby 1.9.1.
ActiveSupport::Multibyte
长期以来一直通过String#mb_chars
在ruby 1.8.x中微妙地进行i18n弹跳.
ActiveSupport::Multibyte
has long had great i18n case jiggering in ruby 1.8.x via String#mb_chars
.
但是,当在ruby 1.9.1下尝试时,它似乎不起作用.这是我写的一个简单的测试脚本,以及得到的输出:
However, when tried under ruby 1.9.1, it doesn't seem to work. Here's a simple test script I wrote, along with the output I'm getting:
$ cat test.rb
# encoding: UTF-8
puts("@ #{RUBY_VERSION} " + (__ENCODING__ rescue $KCODE).to_s)
sd, su = "Iñtërnâtiônàlizætiøn", "IÑTËRNÂTIÔNÀLIZÆTIØN"
def ps(u, d, k); puts "%-30s: %24s / %-24s" % [k, u, d] end
ps sd.upcase, su.downcase, "Plain ruby"
require 'rubygems'; require 'active_support'
ps sd.upcase, su.downcase, "With active_support"
ps sd.mb_chars.upcase.to_s, su.mb_chars.downcase.to_s, "With active_support mb_chars"
$ ruby -KU test.rb
@ 1.8.7 UTF8
Plain ruby : IñTëRNâTIôNàLIZæTIøN / iÑtËrnÂtiÔnÀlizÆtiØn
With active_support : IñTëRNâTIôNàLIZæTIøN / iÑtËrnÂtiÔnÀlizÆtiØn
With active_support mb_chars : IÑTËRNÂTIÔNÀLIZÆTIØN / iñtërnâtiônàlizætiøn
$ ruby1.9 test.rb
@ 1.9.1 UTF-8
Plain ruby : IñTëRNâTIôNàLIZæTIøN / iÑtËrnÂtiÔnÀlizÆtiØn
With active_support : IñTëRNâTIôNàLIZæTIøN / iÑtËrnÂtiÔnÀlizÆtiØn
With active_support mb_chars : IñTëRNâTIôNàLIZæTIøN / iÑtËrnÂtiÔnÀlizÆtiØn
那么,如何使用ruby 1.9.1将upcase
和downcase
国际化?
So, how do I get internationalized upcase
and downcase
with ruby 1.9.1?
我应该补充一点,我还通过GitHub上当前的master
,2-3-*
和3-0-unstable
rails分支对ActiveSupport进行了测试.结果相同.
I should add that I also tested with ActiveSupport from the current master
, 2-3-*
and 3-0-unstable
rails branches at GitHub. Same results.
推荐答案
大小写转换取决于语言环境,并且并不总是往返的,这就是为什么Ruby 1.9没有覆盖它的原因(请参见此处)
Case conversion is locale dependent and doesn't always round-trip, which is why Ruby 1.9 doesn't cover it (see here and here)
unicode-util gem 应该可以满足您的需求.
The unicode-util gem should address your needs.
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