# cf. http://en.wikipedia.org/wiki/Control_character and 
# http://ascii.cl/control-characters.htm

printf '\033'"\n" | cat -vet -
printf '\x0d'"\n" | cat -vet -

[ctrl-v][esc]
[ctrl-v][ctrl-m]

printf '[ctrl-v][ctrl-m]' | cat -vet -; echo


# cf. http://codesnippets.joyent.com/posts/show/1630
printf !:1 | sed -n -e 'l' 

# for an alternative to !:1 try [esc][ctrl][y]
printf !:1 | pbcopy    

# cf. man ascii
printf $(pbpaste) | od -A n -b
printf $(pbpaste) | od -A n -t xC
printf $(pbpaste) | od -A n -t dC

printf $(pbpaste) | od -A n -c
printf $(pbpaste) | od -A n -a

echo $'hel\rlo' 
echo $'hel\rlo' | sed s/[ctrl-v][ctrl-m]//
echo $'hel\rlo' | sed 's/[ctrl-v][ctrl-m]//'
echo $'hel\rlo' | sed "s/[ctrl-v][ctrl-m]//"
echo $'hel\rlo' | sed s/$'[ctrl-v][ctrl-m]'//


man infocmp
infocmp --help

infocmp -1 | grep '\^'
infocmp -1 | grep '\<k'
infocmp -L1 | grep '\^'
infocmp -I1 | grep '\^'
infocmp -C1 | grep '\^'
infocmp -L | grep cursor


tput cup 0 0
clear
tput cup 0 0 | cat -vet -; echo
tput cup 0 0 | sed -n -e 'l'
tput cup 0 0 | od -A n -c | sed '$,$d'
tput cup 0 0 | od -A n -a | sed '$,$d'
tput cup 0 0 | od -A n -b | sed '$,$d'
tput cup 0 0 | od -A n -t xC | sed '$,$d'

tput sgr0 | cat -vet -; echo
tput cuu | cat -vet -; echo
tput up | cat -vet -; echo
tput dl1 | cat -vet -; echo

tput kbs | wc -c
tput kbs | ruby -n -e 'p $_.to_s'


printf "%s\000\n" "str" | cat -vet -
printf "%s\000\n" "str" | od -A n -b | sed '$,$d'
printf "%s\000\n" "str" | sed -n -e 'l'
printf "%s\000\n" "str" | ruby -n -e 'p $_.to_s'