newbie's regex question

[NPtr]

I need to crop all text between one expression(let it be expr1) and the
first match of another(expr2). The text looks like:
some text expr1 some text expr2 some text expr2. I know nothing
about length of the text.
The point is that i can't just write expr1(.*)expr2, because the expr2 is
repeated more than one time (and it crops everything before the last match
of expr2 ), but I need the text just before the first match of expr2. Maybe
I can say that "some text" must not contain expr2, but i don't know how to
do this. Help me please.

Thank you in advance.

 

[hiwa]

I need to crop all text between one expression(let it be expr1) and the
first match of another(expr2). The text looks like:
some text expr1 some text expr2 some text expr2. I know nothing
about length of the text.
The point is that i can't just write expr1(.*)expr2, because the expr2 is
repeated more than one time (and it crops everything before the last match
of expr2 ), but I need the text just before the first match of expr2. Maybe
I can say that "some text" must not contain expr2, but i don't know how to
do this. Help me please.

Thank you in advance.

Use reluctant quantifiers.
See API doc for Pattern class.

 

[NPtr]

Use reluctant quantifiers.
See API doc for Pattern class.

Thanks, it works. Sorry for the stupid question.
I thought I had tried these qualifiers, but in fact I hadn't.