ruby-on-rails – Ruby gsub字符串中的多个字符
发布时间：2020-12-16 20:27:30 所属栏目：百科 来源：网络整理
导读：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个？谢谢. 解决方法 String#gsub 和 Hash#fetch 将是不错的选择. a
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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个？谢谢. 解决方法String#gsub和
Hash#fetch将是不错的选择.
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"
要么, a = "every good boy does fine"
h = {"every" => "all","fine" =>"well" }
Regexp.new("^#{h.keys.join('|')}$") # => /^every|boy|fine$/
a.gsub(Regexp.new("^#{h.keys.join('|')}$"),h)
# => "all good girl does well"
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