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MathGroup Archive 1993

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Adding an element to a list

  • To: mathgroup at yoda.physics.unc.edu
  • Subject: Adding an element to a list
  • From: JWENDEL at isdmnl.wr.usgs.gov
  • Date: Fri, 29 Jan 1993 11:12:48 -0800 (PST)

This is to answer the query from neilb, who found that an attempt to add 1
to the last element of the list {x,y,z,0,0} produced {x,y,z,1,1}, mysteriously.
I tried it with tracing turned On[] and found that the replacement command
is being interpreted as applied to the zeros in the list, because l at
position Length[l] is 0, so 1 is added to all the 0's.





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