如何让jQuery看到.clone（）元素？(How to get jQuery to see .clone() elements?)

 你可以这样做： 
 
replacements = [ ["☺", ":)"], ["☹", ":("] ]
replacements.each {|replacement| str.gsub!(replacement[0], replacement[1])}
 
 可能有一个更有效的解决方案，但这至少使代码更清洁 

Since Ruby 1.9.2, String#gsub accepts hash as a second parameter for replacement with matched keys. You can use a regular expression to match the substring that needs to be replaced and pass hash for values to be replaced.
 
Like this:
 
'hello'.gsub(/[eo]/, 'e' => 3, 'o' => '*')    #=> "h3ll*"
'(0) 123-123.123'.gsub(/[()-,. ]/, '')    #=> "0123123123"
 
In Ruby 1.8.7, you would achieve the same with a block:
 
dict = { 'e' => 3, 'o' => '*' }
'hello'.gsub /[eo]/ do |match|
   dict[match.to_s]
 end #=> "h3ll*"