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1 point by evanrmurphy 3141 days ago | link | parent

But the let example I gave a few comments ago didn't use a transient symbol. Why does it work?

I chatted with PicoLisp's author, Alexander Burger, yesterday on IRC. If I catch him again, I can ask for clarification about the scoping/binding quirks.



2 points by rocketnia 3141 days ago | link

I think it works because while you're inside the let, you don't call anything that depends on a global function named x. :) That's in the FAQ too:

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What happens when I locally bind a symbol which has a function definition?

That's not a good idea. The next time that function gets executed within the dynamic context the system may crash. Therefore we have a convention to use an upper case first letter for locally bound symbols:

  (de findCar (Car List)
     (when (member Car (cdr List))
        (list Car (car List)) ) )
;-)

http://software-lab.de/doc/faq.html#bind

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