正则表达式匹配首字母缩略词 [英] RegEx to match acronyms

问题描述

我正在尝试编写一个正则表达式来匹配 U.S.、D.C.、U.S.A. 等值

I am trying to write a regular expression that will match values such as U.S., D.C., U.S.A., etc.

这是我目前所拥有的 -

Here is what I have so far -

\b([a-zA-Z]\.){2,}+

注意这个表达式如何匹配但不包括首字母缩略词中的最后一个字母.

Note how this expression matches but does not include the last letter in the acronym.

谁能帮忙解释一下我在这里遗漏了什么?

Can anyone help explain what I am missing here?

解决方案

我在这里发布解决方案，以防它对任何人有帮助.

I'm posting the solution here in case this helps anyone.

\b(?:[a-zA-Z]\.){2,}

这里好像需要一个非捕获组.

It seems as if a non-capturing group is required here.

推荐答案

Try (?:[a-zA-Z]\.){2,}

?:(非捕获组)是因为您想省略捕获重复组的最后一次迭代.

?: (non-capturing group) is there because you want to omit capturing the last iteration of the repeated group.

例如，没有 ?:, 'U.S.A.'将产生您不感兴趣的小组赛A.".

For example, without ?:, 'U.S.A.' will yield a group match 'A.', which you are not interested about.

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