正则表达式-单词的匹配缩写 [英] Regex - Matching Abbreviations of a Word

问题描述

我在考虑提供以下正则表达式作为对这个问题，但我似乎无法写出我正在寻找的正则表达式：

I was thinking in providing the following regex as an answer to this question, but I can't seem to write the regular expression I was looking for:

w?o?r?d?p?r?e?s?s?

这应该与单词 wordpress ，但它也完全不能匹配。

This should match a ordered abbreviation of the word wordpress, but it can also match nothing at all.

如何修改上面的正则表达式，使其按顺序匹配至少4个字符？像这样：

How can I modify the above regex in order for it to match at least 4 chars in order? Like:

• 单词


• wrdp


• press


• wordp


• wpress


• wordpress

• word
• wrdp
• press
• wordp
• wpress
• wordpress

我想知道什么是最好的方法... =）

I'd like to know what is the best way to do this... =)

推荐答案

您可以使用前瞻性断言：

You could use a lookahead assertion:

^(?=.{4})w?o?r?d?p?r?e?s?s?$

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