正则表达式模式匹配到数组

Question

我的字符串定义如下：

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

要删除{{}}，我正在执行以下操作：

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

我现在要做的是将与正则表达式匹配的每个项目放入一个数组中，以便最终结果如下所示：

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

提前致谢。

Answer 1

String#gsub，String#gsub!接受可选的block参数。块的返回值用作替换字符串。

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."