Question

代码：

arr = ["this is | a test","this is a second test","this must be a third test"]
res = ["this is | a test test test ","this is a second test test test","this must be a third test test test"]

result = Hash.new

arr.each do |c|
  res.each do |i|
    if (/#{c}/.match("#{i}" ))
      result["#{c}"] = i
    end
  end
end

puts result

结果：

["this is | a test" => "this is a second test test test",
 "this is a second test" => "this is a second test test test",
 "this must be a third test" => "this must be a third test test test"]

问题：

第一场比赛是错误的，“这是一个测试”的最后一场比赛是“这是第二次测试”，我看到他首先匹配第一个值，然后是第二个值。插入休息不是一种选择。我怎么能确定匹配“|”完全匹配，所以我可以得到以下结果：

["this is | a test" => "this is | a test test test ",
 "this is a second test" => "this is a second test test test",
 "this must be a third test" => "this must be a third test test test"]

Answer 1

问题在于，在正则表达式中，x|y具有“匹配正则表达式中的x或y”的特殊含义。因此，

this is | a test

确实会匹配"**this is **a second test test test"

您可以使用Regex.escape：

/#{Regex.escape(c)}/

Ruby匹配错误的特殊字符，如“|”

1 个答案: