Question

I want to replace a log command in a file and output to another file

my log command can be like

log(xxx);
log ( xxx);

so I use the following

cat input.txt | sed -e '/\s*log\s*\(.*\)/d' > output.txt

however, it also replace the the line with “logical”.

What should I change to make it work.

Thanks

Answer 1

Don’t escape the parentheses; you want them to be literal. (Also, as far as I know sed does not support regex character class shorthand.)

sed -e '/[ \t]*log[ \t]*(.*)/d' input.txt > output.txt