Use output of two greps with diff

Question

How do I make better the following method of comparing certain lines (lines that start with "@") of two files? I feel certain this could be done on one line and without embarrassing temporary files. I am pretty new to Linux so go easy on me! Thanks in advance.

grep "^@" myfile1 > temp1
grep "^@" myfile2 > temp2
diff temp1 temp2

Answer 1

In Bash, you can use <(...), which will handle temporaries (usually implemented as named pipes under the hood) for you:

diff <(grep "^@" myfile1) <(grep "^@" myfile2)