在Regex中组合AND和OR运算符

Question

我想在一个正则表达式中组合AND和OR操作。

我有2套标签。设置A和设置B.在一个集合中，我需要一个OR运算，并在设置AND。

之间

示例：

Set A has 3 values:
A1, A2, A3
Set B has 2 values:
B1 and B2

搜索操作示例：

A1 OR A2 AND B2
A2 OR A3 AND B1 OR B2
...

知道如何实现这一目标吗？

Answer 1

  

在一个集合中，我需要一个OR运算，并在之间设置AND。

您可以使用这样的前瞻：

^(?=.*?(?:A1|A2|A3))(?=.*?(?:B1|B2)).*$

说明

(?=.*?(?:A1|A2|A3)) Positive Lookahead - Assert that the regex below can be matched
.*? matches any character (except newline)
Quantifier: Between zero and unlimited times, as few times as possible, expanding as needed
(?:A1|A2|A3) Non-capturing group
1st Alternative: (null, matches any position)
2nd Alternative: A1
A1 matches the characters A1 literally (case sensitive)
3rd Alternative: A2
A2 matches the characters A2 literally (case sensitive)
4th Alternative: A3
A3 matches the characters A3 literally (case sensitive)
(?=.*?(?:B1|B2)) Positive Lookahead - Assert that the regex below can be matched
.*? matches any character (except newline)
Quantifier: Between zero and unlimited times, as few times as possible, expanding as needed
(?:B1|B2) Non-capturing group
1st Alternative: (null, matches any position)
2nd Alternative: B1
B1 matches the characters B1 literally (case sensitive)
3rd Alternative: B2
B2 matches the characters B2 literally (case sensitive)

Answer 2

我会在这里提交Regexps是一个错误的工具。你想要一个解析器。或者，更简单地说，将字符串拆分为"AND"，然后为每个元素拆分"OR"，并检查所有标记是否在同一个集合中。