正则表达式在特定单词之前获取所有单词

Question

I want to get many words as possible before a specific word, but this is getting all characters from all lines.

([\\w\\s]+)( Subtract| Add) is (\\d+) credits

If the the line don't match with full expression it's can't be match, why some lines match anyway?

This line cannot match This line cannot match too No way to match Why is matching this line Apple Banana Orange Add is 34 credits Watermelon Strawberry Subtract is 20 credits Sugar Add is 8 credits

thats a sample https://regexr.com/3to7l

Thanks

Answer 1

the problem is that \\s can match the newlines, and treat the whole of your input as one big match.

To fix your regex :

Replace the first part [\\w\\s]+ by .+ . This will give :

(.+)( Subtract| Add) is (\d+) credits

see here : RegexStorm working example

Note : this actually changes a bit your intent, because non-word and non-space characters can now be matched by .+ . If this is a problem, you might want to use ^ , $ , \\A or \\Z .

See here for more info, for instance : https://www.mikesdotnetting.com/article/46/c-regular-expressions-cheat-sheet

or https://download.microsoft.com/download/D/2/4/D240EBF6-A9BA-4E4F-A63F-AEB6DA0B921C/Regular%20expressions%20quick%20reference.pdf

Answer 2

You can use this RegEx:

.*(?: Subtract| Add) is \d+ credits

and you can test it here