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MathGroup Archive 2000

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Appending an element to a list

  • To: mathgroup at smc.vnet.net
  • Subject: [mg23870] Appending an element to a list
  • From: Felix Farkas <farkas at icamail.epfl.ch>
  • Date: Thu, 15 Jun 2000 00:51:08 -0400 (EDT)
  • Organization: EPFL
  • Sender: owner-wri-mathgroup at wolfram.com

Hello,
 i do have a problem, which is probably very easy,  but i couldn't find
a reasonable way to solve it. I would appreciate very much any hint.

I have a list of lists. My purpose is to append a new elements to this
list. These elements are generated by some function. Sometimes the
output of the function is an empty list meaning no element. In this
situation Append includes the new element in the list. i would like to
avoid this behaviour.

ex:

In[1]:=           d={}
Out[1]=         {}

In[2]:=           Append[{{2,2},{3,3}},d]
Out[2]:=        {{2,2},{3,3},{}}


Thanks in advance. Felix Farkas





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