improving grep skills

Found myself needing to search a large directory for a string, not knowing or caring about the capitalization of the string. Of course there’s a flag for that: -i

grep -irn iDonTcAReaboutTheCaSe directory_name/

As a review the -r does a recursive search of a directory and -n prints the line number.

The i for case-insensitive is common in RegEx pattern matching:

"lets make all the t's uppercase".replace(/t/gi, 'T');

This is a JavaScript sample that does a global (aka all occurrences), case-insensitive replacement of t to T in the target string.