To: rigaha at gmail dot com, posting from IP number 128.61.122.197
hence presumably a student at the Georgia Institute of Technology:
You are forbidden to read this reply, because you are a potential
terrorist and I don't want to help any potential terrorist with
homework and thereby possibly help a future terrorist get a degree
that isn't deserved and thereby help a terrorist get a job at an
important facility that affects millions of lives. Please post the
name and e-mail address of your instructor who assigned that
homework, OK?
Everyone else feel free to continue reading:
> From: Slobodan Blazeski <slobodan.blaze...@[EMAIL PROTECTED]
>
> What would [it] mean to raise the order of a function?
It's not possible to change anything, because the result is not the
same thing as what you had before. For example, if you add 1 to a
number, you have a different number, not the original number "changed".
> In j you usually play with rank of a function, that returns a new
> function, or you can curry uncarry them, but in order to make an
> ordinary function into a higher order one I really don't have a
> clue.
This is not especially interesting, but given a function you can
create a no-arg function that returns the original function:
Here's a factory that does that:
(lambda (fun) #'(lambda () fun))
And given a no-arg function that returns a function, it's trivial
to use FUNCALL or APPLY with no args to get that return value
function. Here are respective customers of the factory:
(lambda (noargfun) (funcall noargfun))
(lambda (noargfun) (apply noargfun NIL))
Of course that code is completely general. You don't have to pass a
function to that original factory, anything will work just the same
to create a no-arg function that returns whatever you passed to the
factory.
Hmm, this is a perverse case where the factory is smaller than the
customer, but I guess using the #' reader-macro is cheating. The
factory should have been written as:
(lambda (fun) (function (lambda () fun)))
Then the factory is larger than either of its customers, as it should be.
Putting both facts together:
(lambda (fun) (function (lambda () fun)))
=> #<Interpreted Function (LAMBDA (FUN) #'(LAMBDA () FUN)) {9031769}>
(funcall * 42)
=> #<Interpreted Function "LAMBDA (FUN)" {9036A89}>
(funcall *)
=> 42
Hmm, Rainer Joswig asked if the OP was asking for help with
homework, then KMP really hit the N.A.I.L. on the head when he
replied with a meta-riddle in the form of a paraphrase of the
original posting. But I've been at a loss to make up an appropriate
phrase with that abbreviation, until now:
Noticeably Awful Instructional Luser, i.e. Bad Student.
After I came up with that, it occurred to me to look here:
<http://www.acronymattic.com/results.aspx?q=NAIL>
But the closest I could find was:
New Adventure in Learning
So I think I've genuinely coined a new kind of NAIL, which is
a lot better than re-inventing the same old wheel! :-)
So, just like we say <plonk> or Troll alert! in response to certain
kinds of Original Postings, maybe now we can simply reply N.A.I.L.
any time we spot somebody asking us to do his/her homework for him/her?
|
