Category

Adds the third field of every line and prints the total, ignoring anything non-numeric.

ripgrep finds the files, sed edits them in place. The dry run first is not optional.

jq for the common cases: reformat, pick a path, filter an array, and reshape.

Sorts on the second column and keeps the first row of each group.

grep -o prints only the matching part, which turns grep into a crude extractor.

Matches a date, optionally with a time and a zone. Deliberately strict about separators.

A one-liner that upper-cases the second field of every row, leaving the rest alone.