Return to Answer

Commonmark migration

Source Link

edited Jun 17, 2020 at 9:04

#GNU sed -r, 160

GNU sed -r, 160

Sigh, I thought this would be smaller, but here it is anyway. Unfortunately sed regexes don't have any lookaround capability.

:
s/(.*)1$/   =\1/;t
s/([= ]+)/\1\n\1/
:b
s/   (.*\n)/===\1/;tb
s/(1*)1 $/\n\1/
:c
s/([^\n]*\n[^\n]*\n)(1*)1$/\1\1\2/;tc
s/(=+)(.*)/\1\2\1/
s/(^|\n)(.)/\1=\2/g

Taking input as unary from STDIN:

$ sed -rf boxes.sed <<< "11 111"
=============
=   =   =   =
=============
=   =   =   =
=============
$

#GNU sed -r, 160

Sigh, I thought this would be smaller, but here it is anyway. Unfortunately sed regexes don't have any lookaround capability.

:
s/(.*)1$/   =\1/;t
s/([= ]+)/\1\n\1/
:b
s/   (.*\n)/===\1/;tb
s/(1*)1 $/\n\1/
:c
s/([^\n]*\n[^\n]*\n)(1*)1$/\1\1\2/;tc
s/(=+)(.*)/\1\2\1/
s/(^|\n)(.)/\1=\2/g

Taking input as unary from STDIN:

$ sed -rf boxes.sed <<< "11 111"
=============
=   =   =   =
=============
=   =   =   =
=============
$

GNU sed -r, 160

Sigh, I thought this would be smaller, but here it is anyway. Unfortunately sed regexes don't have any lookaround capability.

:
s/(.*)1$/   =\1/;t
s/([= ]+)/\1\n\1/
:b
s/   (.*\n)/===\1/;tb
s/(1*)1 $/\n\1/
:c
s/([^\n]*\n[^\n]*\n)(1*)1$/\1\1\2/;tc
s/(=+)(.*)/\1\2\1/
s/(^|\n)(.)/\1=\2/g

Taking input as unary from STDIN:

$ sed -rf boxes.sed <<< "11 111"
=============
=   =   =   =
=============
=   =   =   =
=============
$

Source Link

created Jun 11, 2015 at 16:03

Digital Trauma

#GNU sed -r, 160

Sigh, I thought this would be smaller, but here it is anyway. Unfortunately sed regexes don't have any lookaround capability.

:
s/(.*)1$/   =\1/;t
s/([= ]+)/\1\n\1/
:b
s/   (.*\n)/===\1/;tb
s/(1*)1 $/\n\1/
:c
s/([^\n]*\n[^\n]*\n)(1*)1$/\1\1\2/;tc
s/(=+)(.*)/\1\2\1/
s/(^|\n)(.)/\1=\2/g

Taking input as unary from STDIN:

$ sed -rf boxes.sed <<< "11 111"
=============
=   =   =   =
=============
=   =   =   =
=============
$