The stuff after trailing slashes in regexps

[filburt1]

It took quite a bit of research, but here's what those characters after regular expressions mean:

i: case-insensitive
c: effectively means return what doesn't match the expression
m: don't ignore whitespace differences
s: ignore multiple lines when using the match chars (*, ?, +, etc.)
x: allow whitespace and comments (for readability)
U: don't be greedy

I still can't figure out what U does (vB uses //siU everywhere), but those five are the common ones.

[Boofo]

What does the i do in siU?

[filburt1]

Case-insensitive (stupid JS-based vB code generator...)

[Logician]

Today at 05:16 AM filburt1 said this in Post #1 (https://vborg.vbsupport.ru/showthread.php?postid=399617#post399617)
I still can't figure out what U does (vB uses //siU everywhere), but those five are the common ones.
U specifies "greediness". Roughly that is whether search returns the largest matched pair or the smallest, if there are more than 1 matches.

[filburt1]

But isn't .? used for that (rather than .*)?

[Logician]

Say you have this text:

aaaaa

ccccccccccccc

dddddddddddd

eeeeeeeee

ffffffffffff

and you are trying to match chars between tags. Would your regular expression return:

dddddddddddd

or:

ccccccccccccc
[bbb]
dddddddddddd

eeeeeeeee


that is what greediness parameter specifies.

[filburt1]

I know what it means, I mean that isn't that what the ? operator is used for rather than the * operator?