1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10

function todo -d "Manage CSV todo lists"
    switch $argv[1]
        case +
            echo "$argv[3..],$(date -Is)," >>$argv[2]
        case -
            sed -i "$argv[3]s/\$/$(date -Is)/" $argv[2]
        case =
            grep -n ',$' $argv[2..]
    end
end