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lol J
author Jordi Gutiérrez Hermoso <jordigh@octave.org>
date Mon, 25 Nov 2013 11:56:30 -0500
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NB. !/\. B -------------------------------------------------------------

(1 1 0 1,:0 1 0 1) -: <:/\. 0 0 1 1 ,: 0 1 0 1

outof=: 4 : 'x!y'

f=: 3 : '(!/\. -: outof/\.) y ?@$ 2'
,f"1 x=.7 8 9,."0 1 [ _1 0 1+  255
,f"1 |."1 x
,f"1 x=.7 8 9,."0 1 [ _1 0 1+4*255
,f"1 |."1 x

'domain error' -: !/\. etx 'deipnosophist'
'domain error' -: !/\. etx ;:'professors in New England'

4!:55 ;:'f outof x'