ruby 1.9 有没有办法从字符串中删除无效的字节序列? [英] Is there a way in ruby 1.9 to remove invalid byte sequences from strings?

问题描述

假设你有一个像 "€fooxA0" 这样的字符串，编码为 UTF-8，有没有办法从这个字符串中删除无效的字节序列?(所以你得到 "€foo" )

Suppose you have a string like "€fooxA0", encoded UTF-8, Is there a way to remove invalid byte sequences from this string? ( so you get "€foo" )

在 ruby​​-1.8 中，您可以使用 Iconv.iconv('UTF-8//IGNORE', 'UTF-8', "€fooxA0") 但现在已弃用."€fooxA0".encode('UTF-8') 什么都不做，因为它已经是 UTF-8.我试过了:

In ruby-1.8 you could use Iconv.iconv('UTF-8//IGNORE', 'UTF-8', "€fooxA0") but that is now deprecated. "€fooxA0".encode('UTF-8') doesn't do anything, since it is already UTF-8. I tried:

"€fooxA0".force_encoding('BINARY').encode('UTF-8', :undef => :replace, :replace => '')

产生

"foo"

但这也失去了有效的多字节字符€

But that also loses the valid multibyte character €

推荐答案

"€fooxA0".chars.select(&:valid_encoding?).join

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