[Axiom-developer] [#185 append vs concat] (new)

[anonymous]

Changes http://page.axiom-developer.org/zope/mathaction/185AppendVsConcat/diff
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The append function in axiom has the lisp background.  
axiom and lisp don't duplicate the last list.

L1 := [1,2,3] ; L2 := [10,11,12] ; L := append (L1, L2) ; L2.2 := 100 
L.5 -- is 100, not 11

There is also a concat function that I understand in a mathematical way.
today concat works as append.

L1 := [1,2,3] ; L2 := [10,11,12] ; Lc := concat (L1, L2) 

Lc doesn't change if I change L1, and Lc change if I modify L2.
Is it possible to change concat in order to copy L2, as 
concat (L1, L2) == append (L1, copy (L2))

The concat function becomes just a little slower.
And then list are here a real hi-level n-uple oblject, not a lisp object.
 
F.Maltey
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