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newlispfanclub.alh.net • View topic - extract analogous to extend?

extract analogous to extend?

Pondering the philosophy behind the language

extract analogous to extend?

Postby TedWalther » Thu Feb 09, 2012 6:07 am

I was just trying to use "pop" to pop several items off the front of a list. I'm making a MIDI debugger. I've been very happy with the ease that newLISP has allowed for bit-banging this serial protocol.

My only gripe so far is that there is no equivalent to "pop" that lets me take multiple elements from a list. How about "extract" that is like "slice", but destructive like "extend"? Or some boolean flag to slice?

That, and bind wants the variables in the association list to all have names that begin with Uppercase. That is annoying. I note that the examples in the manual don't require this. Am I doing something wrong? Bind+unify is very cool, but the Title-case requirement is a boner-killer. Otherwise, a syntax like (setq '(a b c d) (some-function)) would be nice. Similarly with the let family. Or is this something where I am supposed to use macro wizardry by diving into my copy of Paul Graham's "On Lisp" and translating to newLISP?

Ted
Cavemen in bearskins invaded the ivory towers of Artificial Intelligence. Nine months later, they left with a baby named newLISP. The women of the ivory towers wept and wailed. "Abomination!" they cried.
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Re: extract analogous to extend?

Postby Lutz » Thu Feb 09, 2012 5:45 pm

Can you tell us more about the application problem you want to solve and give code examples?
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Re: extract analogous to extend?

Postby Lutz » Fri Feb 10, 2012 3:17 pm

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Re: extract analogous to extend?

Postby TedWalther » Sat Feb 11, 2012 5:59 pm

Yes, you are right, it is unify that wants title-case. I feel foolish now; thanks for the map-set example. That is what I wanted.
Cavemen in bearskins invaded the ivory towers of Artificial Intelligence. Nine months later, they left with a baby named newLISP. The women of the ivory towers wept and wailed. "Abomination!" they cried.
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Re: extract analogous to extend?

Postby William James » Wed Mar 07, 2012 10:12 am

Last edited by William James on Wed Mar 07, 2012 9:12 pm, edited 1 time in total.
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Re: extract analogous to extend?

Postby rickyboy » Wed Mar 07, 2012 8:38 pm

(λx. x x) (λx. x x)
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Re: extract analogous to extend?

Postby William James » Wed Mar 07, 2012 9:13 pm

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