正則表達式匹配到一個數組

Question

我有一個字符串定義如下：

st = "The quick {{brown}} fox jumped over the {{fence}}." 

要刪除{{}}，我做了以下內容：

st.gsub(/{{(.*?)}}/, '\1') 
=> "The quick brown fox jumped over the fence." 

我想現在要做的就是把每一個匹配的正則表達式到一個數組中的項目，從而使最終的結果是這樣的：在廣告

arr = [] 
puts arr => ['brown', 'fence'] 
puts st => "The quick brown fox jumped over the fence." 

謝謝萬斯。

Answer 1

String#gsub,String#gsub!接受可選的塊參數。塊的返回值用作替換字符串。

st = "The quick {{brown}} fox jumped over the {{fence}}." 
arr = [] 
st.gsub!(/{{(.*?)}}/) { |m| arr << $1; $1 } 
st 
# => "The quick brown fox jumped over the fence." 
arr 
# => ["brown", "fence"] 

Answer 2

st.gsub!(/{{(.*?)}}/).with_object([]){|_, a| a.push($1); $1} #=> ["brown", "fence"] 
st #=> "The quick brown fox jumped over the fence."