From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,ac39a12d5faf5b14 X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-04-23 12:34:35 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!canoe.uoregon.edu!hammer.uoregon.edu!skates!not-for-mail From: Stephen Leake Newsgroups: comp.lang.ada Subject: Re: Grace and Maps (was Re: Development process in the Ada community) Date: 23 Apr 2002 15:26:42 -0400 Organization: NASA Goddard Space Flight Center (skates.gsfc.nasa.gov) Message-ID: References: <3CB46975.90408@snafu.de> <3CBAFFEE.2080708@snafu.de> <4519e058.0204171036.6f0a7394@posting.google.com> <3CBDD795.4060706@snafu.de> <4519e058.0204180800.44fac012@posting.google.com> <3CBF0341.8020406@mail.com> <4519e058.0204190529.559a47ae@posting.google.com> <3CC1C6B3.6060306@telepath.com> <3CC21747.5000501@telepath.com> <3CC59ED2.1000803@home.com> <3CC5B286.6FE61551@san.rr.com> NNTP-Posting-Host: anarres.gsfc.nasa.gov Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: skates.gsfc.nasa.gov 1019590372 23758 128.183.220.71 (23 Apr 2002 19:32:52 GMT) X-Complaints-To: usenet@news.gsfc.nasa.gov NNTP-Posting-Date: 23 Apr 2002 19:32:52 GMT User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 Xref: archiver1.google.com comp.lang.ada:23009 Date: 2002-04-23T19:32:52+00:00 List-Id: Darren New writes: > Stephen Leake wrote: > > This is true; we should allow for different implementations. However, > > I seriously doubt anyone would implement a non-sorted map for a > > serious application. > > I think there are *tons* of applications that use unsorted maps, i.e., > hash tables. Entire file systems have been built on same, for example. > If the key is an arbitrary value (e.g., some random token used merely to > identify the object, like a social-security-number) then there's little > point in sorting the values. Of course, if you ever need it sorted, > chances are you want to keep it sorted. But AFAIK, none of the scripting > languages (Tcl, Perl, Python) have sorts for their > internally-implemented maps. And they all live with O (n) time? amazing ! :). -- -- Stephe