首页 \ 问答 \ 重塑从长到宽格式[重复](Reshape from long to wide format [duplicate])

重塑从长到宽格式[重复](Reshape from long to wide format [duplicate])

这个问题在这里已经有了答案:

customer_code    items
1                sugar
1                salt       
2                sugar      
2                accessories
3                salt

期望的输出

customer_code   item   item2       item3
1              sugar   salt     
2              sugar             accessories
3                      salt

This question already has an answer here:

example

customer_code    items
1                sugar
1                salt       
2                sugar      
2                accessories
3                salt

Desired output

customer_code   item   item2       item3
1              sugar   salt     
2              sugar             accessories
3                      salt

原文:https://stackoverflow.com/questions/30392810
更新时间:2021-03-26 10:03

最满意答案

要捕捉所有到下一个问题的句子,以非贪婪的方式( (.*)? )跟随问题或文本结尾( (?=^(.*?)\?$|\Z) )。 由于它是零长度断言,所以后者应该使用积极的后台处理进行匹配。

(?ms)(^[^.?!]+\?)(.*?)(?=^(.*?)\?$|\Z)

演示: https//regex101.com/r/yEOtAa/1


To capture all sentences up to the next question match any text after a question in non-greedy fashion ((.*)?) followed by a question or end of text ((?=^(.*?)\?$|\Z)). The latter should be matched using positive look-behind since it's a zero-length assertion.

(?ms)(^[^.?!]+\?)(.*?)(?=^(.*?)\?$|\Z)

Demo: https://regex101.com/r/yEOtAa/1

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