正则表达式 - 匹配所有单词但只匹配唯一单词一次 [英] Regular expression - match all words but match unique words only once

问题描述

是否可以使用正则表达式匹配所有单词但只匹配唯一单词一次?我知道还有其他方法可以做到这一点，但我很想知道使用正则表达式是否可行.

Is it possible to use a regular expression to match all words but match unique words only once? I am aware there are other ways of doing this however I'm interested in knowing if this is possible with the use of a regular expression.

例如我目前有以下表达式:

For example I currently have the following expression:

(\w+\b)(?!.*\1)

和以下字符串:

glass shoes door window door glasses. window glasses

在大多数情况下，该表达式有效并匹配以下单词:

For the most part the expression works and matches the following words:

shoes
door 
window
glasses

这有两个问题:

1. 在带有glass"的glasses"上匹配子字符串，这是不正确的.

1. A match for a substring is being made on "glasses" with "glass", this is incorrect.

眼镜"和眼镜".应该匹配，但目前不匹配.

"glasses" and "glasses." should match but currently do not.

最终匹配应该是:

shoes 
door 
window 
glasses 
glass 

推荐答案

很接近，只是看了下负lookahead中的\b

Pretty close, just readd the \b in the negative lookahead

/(\w+\b)(?!.*\1\b)/

在 Rubular

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