In this text:

warning here
there are several types of warnings
in this string warning.gif
at the end warning
end of line warning

I want to match every warning except warning.gif.

I cannot seem to get it to include the last one that has no character (control or otherwise) after it.

usi开发者_JAVA技巧ng warnings?[^\.] gets what I want except for the last warning (on the last line). I think because there is no character at all after. How can I get it to include that one?

If you have negative lookaheads you can use that:

/warnings?(?!\.gif)/

This should work in Javascript.

EDITED

I completely misread the question. My apologies.

Here's a corrected solution:

Alternatives can bind more tightly than the eof marker.

Example file:

warning here
there are several types of warnings
in this string warning.gif
at the end warning
end of line warning

Example script:

awk '/warnings?$|warnings?[[:space:]]/ { print }' /home/geocar/g.txt

Original (wrong) answer:

Use: /warnings?$/m - note that the "?" means that the "s" is optional