MathGroup Archive 2002

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Union

  • To: mathgroup at smc.vnet.net
  • Subject: [mg33101] Union
  • From: Helge Andersson <helgea at inoc.chalmers.se>
  • Date: Sun, 3 Mar 2002 06:30:22 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Hello,

I wonder if it is possible to disable the sort-function of the Union command?
If not, can someone give me a short and nice procedure f, that can get the 
union of a list with the original order preserved (the first apperance 
should be left in the list). I'm not interrested in Do-loops solutions and 
and similar procedures (I can do that myself)

example
in:
f[{5,4,3,4,1,6}]

out:
{5,4,3,1,6}

Thanks in advance
/Helge Andersson



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