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*To*: srfi-77@xxxxxxxxxxxxxxxxx*Subject*: Re: arithmetic issues*From*: Marcin 'Qrczak' Kowalczyk <qrczak@xxxxxxxxxx>*Date*: Mon, 24 Oct 2005 00:25:47 +0200*Delivered-to*: srfi-77@xxxxxxxxxxxxxxxxx*In-reply-to*: <87k6g4m0w6.fsf@xxxxxxxxxxxxxxxxx> (Thomas Bushnell's message of "Sun, 23 Oct 2005 13:30:49 -0700")*Mail-followup-to*: srfi-77@xxxxxxxxxxxxxxxxx*References*: <20051021145326.816C11B77BB@xxxxxxxxxxxxxxxxxxxxx> <20051021155906.GC16464@NYCMJCOWA2> <Pine.LNX.4.58.0510210910130.18969@xxxxxxxxxxxxxx> <20051022020312.GB5632@NYCMJCOWA2> <87mzl2mhd3.fsf@xxxxxxxxxxxxxxxxx> <20051022023824.GD5632@NYCMJCOWA2> <87r7adv5ii.fsf@xxxxxxxxxxxxxxxxx> <20051023160247.GC7728@NYCMJCOWA2> <8764roowey.fsf@xxxxxxxxxxxxxxxxx> <87br1g2d96.fsf@xxxxxxxxxxxxx> <87k6g4m0w6.fsf@xxxxxxxxxxxxxxxxx>*Sender*: Marcin 'Qrczak' Kowalczyk <qrczak@xxxxxxxxxx>*User-agent*: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux)

Thomas Bushnell BSG <tb@xxxxxxxxxx> writes: >>> An implementation could use sparse arrays for long arrays with >>> empty space and linear arrays for those which are compact. What is >>> wrong with that? >> >> Why no implementation does it? > > I can't parse that sentence, sorry. Why no current implementation uses sparse arrays as the representation of (some) vectors? Or does any? If no implementation does a particular thing, then perhaps it's not a wise choice to do. Leaving room for it only reduces programmer confidence and encourages them to rely on common practice instead of on standard guarantees. -- __("< Marcin Kowalczyk \__/ qrczak@xxxxxxxxxx ^^ http://qrnik.knm.org.pl/~qrczak/

**Follow-Ups**:**Re: arithmetic issues***From:*Thomas Bushnell BSG

**References**:**arithmetic issues***From:*Aubrey Jaffer

**Re: arithmetic issues***From:*John.Cowan

**Re: arithmetic issues***From:*bear

**Re: arithmetic issues***From:*John.Cowan

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*John.Cowan

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*John.Cowan

**Re: arithmetic issues***From:*Thomas Bushnell BSG

**Re: arithmetic issues***From:*Marcin 'Qrczak' Kowalczyk

**Re: arithmetic issues***From:*Thomas Bushnell BSG

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