Ruby gsub字符串中的多个字符
Ruby gsub字符串中的多个字符
提问于 2013-12-18 13:59:03
使用Ruby 1.9.3，Rails 3.2，我有以下几点：
"every good boy does fine".gsub("every", "all").gsub("boy", "girl").gsub("fine", "well")
# => "all good girl does well"有没有更好的方法来写这篇文章？谢谢。
回答 5
Stack Overflow用户
回答已采纳
发布于 2013-12-18 14:07:13
String#gsub和Hash#fetch将是很好的选择。
a = "every good boy does fine"
h = {"every" => "all","boy" => "girl", "fine" =>"well" }
a.gsub(/\w+/) { |m| h.fetch(m,m)}
# => "all good girl does well"或,
a = "every good boy does fine"
h = {"every" => "all","boy" => "girl", "fine" =>"well" }
Regexp.new("^#{h.keys.join('|')}$") # => /^every|boy|fine$/
a.gsub(Regexp.new("^#{h.keys.join('|')}$"),h)
# => "all good girl does well"Stack Overflow用户
发布于 2013-12-18 14:03:36
replacements = [ ["every", "all"], ["boy", "girl"],["fine", "well"]
replacements.each {|replacement| str.gsub!(replacement[0], replacement[1])}我不知道是不是更好，但干净多了。
Stack Overflow用户
发布于 2013-12-18 14:09:58
subs = { "every" => "all", "boy" => "girl", "fine" => "well" }
"every good boy does fine".gsub(/\w+/) { |m| subs[m] || m }
# => 'all good girl does well'页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/20650681
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