A proposed new approach to bounds vs. salt
John Cowan
(26 Dec 2015 02:12 UTC)
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Re: A proposed new approach to bounds vs. salt
taylanbayirli@xxxxxx
(26 Dec 2015 14:00 UTC)
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Re: A proposed new approach to bounds vs. salt
Alex Shinn
(30 Dec 2015 12:51 UTC)
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Re: A proposed new approach to bounds vs. salt John Cowan (03 Jan 2016 22:26 UTC)
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Re: A proposed new approach to bounds vs. salt
Shiro Kawai
(04 Jan 2016 02:08 UTC)
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Re: A proposed new approach to bounds vs. salt
Alex Shinn
(07 Jan 2016 05:41 UTC)
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Re: A proposed new approach to bounds vs. salt
Kevin Wortman
(15 Jan 2016 00:45 UTC)
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Re: A proposed new approach to bounds vs. salt John Cowan 03 Jan 2016 22:26 UTC
Alex Shinn scripsit: > Performance matters, so make this syntax. I think it's fine for it to be part of trivial compile-time folding. > A likely idiom > for performance conscious 3rd-party hash functions might > become: > > (define my-hash > (if (fixnum? (hash-default-bound)) > (lambda (obj) ... hash w/ fixnum arith ...) > (lambda (obj) ... hash w/ general arith ...))) Yes, that's plausible. > Regarding using the sign of an optional bound argument as > a semantic toggle, I agree with Taylan. We should be removing > warts, not adding new ones. Not even in the core language did > we do anything so strange in the name of backwards compatibility. True. > Why the sudden obsession with compatibility at the expense of > clean design just for hash tables? R7RS-small was all about compatibility. I'm trying to keep the number of backward incompatible changes for R7RS-large as small as possible too. Hash tables are a can of worms, but they have to be opened and served up somehow. -- John Cowan http://www.ccil.org/~cowan xxxxxx@ccil.org I must confess that I have very little notion of what [s. 4 of the British Trade Marks Act, 1938] is intended to convey, and particularly the sentence of 253 words, as I make them, which constitutes sub-section 1. I doubt if the entire statute book could be successfully searched for a sentence of equal length which is of more fuliginous obscurity. --MacKinnon LJ, 1940