在其他两个不同字符串之间匹配字符串

Question

Another regex question:

I'd like to capture text that exists between two different marker strings. The thing is, the marker strings have a few options. For example:

I'm very hungry for a sandwich and tomorrow I'll go to the store - capturing between "I'm very hungry" and "and"

I'm very tired so I'll go to sleep . - capturing between "I'm very tired" and ".".

I'm coding in Javascript, and I thought:

/string one(.*?)string two|\.|string three|string four/gi

But that doesn't seem to work. It just grabs between string one and string two ignoring string three and string four .

What am I doing wrong with the regex?

Answer 1

maybe you need to group strings because | has low precedence

/string one(.*?)(?:string two|\.|string three|string four)/gi

Edit: adding parentheses changes precedence because the expression in parentheses is evaluated before the rest of the expression. In addition, here we use non-capturing groups because we use the (?: syntax.