Verb f below is an example of "Subtle J". Is there a "Simple J" way?
I first saw verb f in a note from Linda Alvord.
f=: 13 :'x&(+./@E.)&>y'
'bc' f 'a bc def';'ab cde f';'abc d ef'
1 0 1
As you see, f tells which strings on the right contain the left string.
Experienced J users know that f operates by first forming the verb
x&(+./@E.)&> and then applying that verb to y . They also know "that
verb" will be applied to each box in y independently of the others and
the separate results assembled into the final answer.
Is there a way to do it using mostly trains and rank? A "Simple J" way
for less experienced users?
You hear the plea of an ex college teacher who dealt with less
experienced users!
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