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problem with induction #2



Before anyone takes a closer look at the crap I wrote in my mail
"problem with induction", here's a solution:


forget about the induction, just return a new function:

t(str, ba): book_array =
  (LAMBDA (n: range): 
     IF ba(n)`titel = str THEN ba(n)
     ELSE none
     ENDIF)

Thanks anyway,

-c