Hello David, This took a while but it has no & or &.
A=:'house on hill'
B =: 'h' ~: A
f=: 13 :' [&.(g=:B&(#!.''M'')) y'
f A
Mouse on Mill
j=: 13 :'0 1 1 1 1 1 1 1 1 0 1 1 1 (#!.''M''^:_1 [: [ h) y'
j A
Mouse on Mill
j
0 1 1 1 1 1 1 1 1 0 1 1 1 (#!.'M'^:_1 ([: [ h)) ]
Here's how I got there.
g A
ouse on ill
h=:13 :' (0 1 1 1 1 1 1 1 1 0 1 1 1)(#!.''M'')y'
h A
ouse on ill
(g-:h)A
1
h b. _1
0 1 1 1 1 1 1 1 1 0 1 1 1&(#!.'M')^:_1
i=: 13 :'(0 1 1 1 1 1 1 1 1 0 1 1 1&(#!.''M'')^:_1) [ h y'
i A
Mouse on Mill
j=: 13 :'0 1 1 1 1 1 1 1 1 0 1 1 1 (#!.''M''^:_1 [: [ h) y'
j A
Mouse on Mill
Linda
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of David Lambert
Sent: Wednesday, May 14, 2014 10:24 AM
To: programming
Subject: [Jprogramming] Substitution with under
NB. New substitution? Surely someone can verbalize this.
A =: 'house on hill'
B =: 'h' ~: A
[&.(B&(#!.'M')) A
Mouse on Mill
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