function xdg-user-directory
    string replace '@' '' \
      (string join '' '$XDG_' (string upper $argv[1]) '_DIR')
end

function bang-bang
    echo "$history[1]"
end

function bang-bang-k
    set -l k (string replace '!!:' '' $argv[1])
    set -l arr (string replace -ra '([^\\\ ])( |\n)+' '$1\n' $history[1])
    echo $arr[$k]
end

function bang-dollar
    set -l arr (string replace -ra '([^\\\ ])( |\n)+' '$1\n' $history[1])
    echo $arr[-1]
end

function bang-star
    set -l arr (string replace -ra '([^\\\ ])( |\n)+' '$1\n' $history[1])
    echo $arr[..-2]
end