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使用gsub去除多个字符(Using gsub to strip multiple characters)


XXXX - 永远不变,永远改变,可能是一百万字符长
yyyy - 永远不会改变,确切的字符数
!!!! - 这是我想要在清理字符串后得到的数据。 此数据也将始终更改
zzzz - 永远不会改变,确切的字符数


string = "XXXXyyyy!!!!zzzz"  
# => "XXXXyyyy!!!!"

接下来我该怎么办才能得到"!!!!" 。 如何使用'yyyy' (静态)擦除"XXXXyyyy"并仅留下"!!!!" 。 我希望这能解释我的问题。 抱歉最后一个。

I have an object which contains the following string "XXXXyyyy!!!!zzzz"

XXXX - never the same, will always change, it may be a million characters long
yyyy - will never change, exact number of characters all the time
!!!! - this is the data I want to result with after I clean the string. This data will always change as well
zzzz - will never change, exact number of characters all the time

so if:

string = "XXXXyyyy!!!!zzzz"  
# => "XXXXyyyy!!!!"

What can I do next to get just "!!!!". How can I use 'yyyy', which is static, to erase "XXXXyyyy" and leave only "!!!!". I hope this explains my question. Sorry about the last one.

更新时间:2019-07-08 12:55



string[/yyyy(.*)zzzz\z/, 1]  

You should do it in once:

string[/yyyy(.*)zzzz\z/, 1]  



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