Ruby 1.8.7（或 Rails 2.x）中的 String.force_encoding()

发布于 2024-10-10 06:20:01 字数 780 浏览 5 评论 0原文

是否有解决方案可以在 Ruby 1.8.7（或 Rails 2.x）中使用 String.force_encoding() ，以便它像在 Ruby 1.9 中一样工作？我读到了一些关于 require active_support 的内容，但这不起作用

$> 宝石列表 --local | grep 'rails\|activesupport'

 activesupport (3.0.3, 2.3.8, 2.3.5)
 rails (2.3.8, 2.3.5)

$>; ruby -v

ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-darwin10.4.0]

$> Rails -v

Rails 2.3.8

irb：

> require "rubygems"
=> true 
> require "active_support"
=> true 
> "asdf".force_encoding("UTF-8")
NoMethodError: undefined method `force_encoding' for "asdf":String
> String.respond_to?(:force_encoding)
=> false

原文

Is there a solution to use String.force_encoding() in Ruby 1.8.7 (or Rails 2.x) so that it works like in Ruby 1.9? I read something about require active_support, but this does not work

$> gem list --local | grep 'rails\|activesupport'

 activesupport (3.0.3, 2.3.8, 2.3.5)
 rails (2.3.8, 2.3.5)

$> ruby -v

ruby 1.8.7 (2010-08-16 patchlevel 302) [i686-darwin10.4.0]

$> rails -v

Rails 2.3.8

irb:

> require "rubygems"
=> true 
> require "active_support"
=> true 
> "asdf".force_encoding("UTF-8")
NoMethodError: undefined method `force_encoding' for "asdf":String
> String.respond_to?(:force_encoding)
=> false

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九公里浅绿 2024-10-17 06:20:01

这将为您提供 Ruby 1.8.7 和 Ruby 1.9 中的 String#to_my_utf8：

require 'iconv'
class String
  def to_my_utf8
    ::Iconv.conv('UTF-8//IGNORE', 'UTF-8', self + ' ')[0..-2]
  end
end

然后...

?> "asdf".to_my_utf8
=> "asdf"

受到 Paul Battley 还记得我在 remote_table gem。

This will give you String#to_my_utf8 in both Ruby 1.8.7 and Ruby 1.9:

require 'iconv'
class String
  def to_my_utf8
    ::Iconv.conv('UTF-8//IGNORE', 'UTF-8', self + ' ')[0..-2]
  end
end

And then...

?> "asdf".to_my_utf8
=> "asdf"

Inspired by Paul Battley and also remembering some of my older work on the remote_table gem.

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极度宠爱 2024-10-17 06:20:01

force_encoding 在 1.9 中唯一做的事情是它改变了字符串的编码字段，它实际上并没有修改字符串的字节。

Ruby 1.8 没有字符串编码的概念，因此 force_encoding 将是一个空操作。如果您希望能够在 1.8 和 1.9 中运行相同的代码，您可以自己添加它：

class String
  def force_encoding(enc)
    self
  end
end

当然，您还需要做其他事情才能使编码在 1.8 和 1.9 中工作相同，因为它们处理这个问题非常不同。

The only thing force_encoding does in 1.9 is that it changes the encoding field of the string, it does not actually modify the string's bytes.

Ruby 1.8 doesn't have the concept of string encodings, so force_encoding would be a no-op. You can add it yourself like this if you want to be able to run the same code in 1.8 and 1.9:

class String
  def force_encoding(enc)
    self
  end
end

There will of course be other things that you have to do to make encodings work the same across 1.8 and 1.9, since they handle this issue very differently.

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