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Re: Comparing arraies

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In comp.lang.javascript message <yxqybXCQnQLPFw6m@J.A830F0FF37FB96852AD0
8924D9443D28E23ED5CD>, Sat, 4 Feb 2012 10:34:56, John G Harris
<john@nospam.demon.co.uk> posted:


>The example you are looking for is the function that returns the current
>time. It returns different values at different times, so lacks any
>Referential transparency.

I know of a constructor which does that; but is it a function?  Of
course, it can be put into an undoubted function.  If one's code is
quick enough, it can return the same result repeatedly at slightly
different times.

Math.random() will almost always return a different result for every
call, until after 2^n calls, where n is not necessarily as large as
should be hoped for.

function AllDiff() { return +new Date() + String(Math.random()) }

should never repeat itself, unless Math.random is either unexpectedly
good or bad, or the computer is prodigiously fast.

-- 
 (c) John Stockton, Surrey, UK.  ?@merlyn.demon.co.uk   Turnpike v6.05   MIME.
   Web  <http://www.merlyn.demon.co.uk/> - FAQish topics, acronyms, & links.
 Proper <= 4-line sig. separator as above, a line exactly "-- " (SonOfRFC1036)
 Do not Mail News to me. Before a reply, quote with ">" or "> " (SonOfRFC1036)

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Thread

Comparing arraies Archos <raul.san@sent.com> - 2012-01-26 07:23 -0800
  Re: Comparing arraies Martin Honnen <mahotrash@yahoo.de> - 2012-01-26 18:29 +0100
    Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-26 19:50 +0100
      Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-26 19:54 +0100
        Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-27 16:49 +0000
          Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-27 18:41 +0100
            Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-28 11:28 +0000
              Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-28 21:17 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-29 14:55 +0000
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-29 17:13 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-30 15:27 +0000
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-30 19:03 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-31 15:07 +0000
                Re: Comparing arraies Dr J R Stockton <reply1205@merlyn.demon.co.uk> - 2012-01-31 18:51 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-30 12:01 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-31 11:06 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-31 06:08 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-01-31 16:08 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-31 18:32 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-01 17:02 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-01 10:07 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-02 15:10 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-02 11:16 -0800
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-07 15:14 +0000
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-01 21:45 +0100
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-01 13:07 -0800
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-01 23:44 +0100
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-01 18:22 -0800
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-02 23:09 +0100
                Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-02-03 01:47 +0100
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-04 10:34 +0000
                Re: Comparing arraies Dr J R Stockton <reply1205@merlyn.demon.co.uk> - 2012-02-05 16:47 +0000
                Re: Comparing arraies John G Harris <john@nospam.demon.co.uk> - 2012-02-06 15:21 +0000
                Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-02-04 23:37 -0800
    Re: Comparing arraies Denis McMahon <denismfmcmahon@gmail.com> - 2012-01-26 23:08 +0000
      Re: Comparing arraies Denis McMahon <denismfmcmahon@gmail.com> - 2012-01-27 01:42 +0000
        Re: Comparing arraies Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-01-27 11:41 +0100
      Re: Comparing arraies Gene Wirchenko <genew@ocis.net> - 2012-01-26 16:24 -0800
        Re: Comparing arraies "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-01-27 08:50 +0000
      Re: Comparing arraies Dr J R Stockton <reply1204@merlyn.demon.co.uk> - 2012-01-27 21:07 +0000
        Re: Comparing arraies "Evertjan." <exjxw.hannivoort@interxnl.net> - 2012-01-28 13:45 +0000
  Re: Comparing arraies "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2012-01-26 16:21 -0800
    Re: Comparing arraies Martin Honnen <mahotrash@yahoo.de> - 2012-01-27 16:00 +0100

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