The challenge is to give counterexamples to the following J myths.
2. Difficult: Only “caps make it possible to define a wider range of functions
as unbroken trains […] Thus,
h=: >. % [: <. + * -
2.5 h 4
_0.4
”
Hint: one can cheat by searching the Forum.
Bonus puzzle: Find a cap replacement verb for the following utilization, “since
the domain of the cap is empty, it can be used (with :) to define a function
whose monadic or dyadic case invokes an error.”
1. Extreme: J “Conjunctions and adverbs apply” only “to noun or verb
arguments.” In other words, the challenge is to successfully pass an adverb
argument or a conjunction argument to an adverb or to a conjunction.
Hint: After I mentioned to Roger, the last time he visited Hoboken, that it was
possible he reportedly woke up in the middle of the night of the same day with
the solution and closed this back door afterwards, but the facility is still
available in version J601c (and earlier).
0. Extreme: "The cases where u f. is not equivalent to u, of practical
interest or otherwise, are rare and are bugs. These have been fixed for the
next J6.01 beta." That is, find at least one Proverb (and a NOUN) such that
‘Proverb NOUN’ and ‘Proverb f. NOUN’ still do not produce the same result.
Bonus puzzle: Find different (not trivial variations) counterexamples.
I intend to post missing solutions (if any) next year.
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