Variable number of arguments
- To: mathgroup at smc.vnet.net
- Subject: [mg113307] Variable number of arguments
- From: Sam Takoy <sam.takoy at yahoo.com>
- Date: Sat, 23 Oct 2010 07:04:44 -0400 (EDT)
Hi,
I'm looking for help writing functions with variable number of arguments.
For example, how do I accomplish the (rather artificial) task of writing
the function FunnySum that:
- When called with multiple arguments, sums them
- When called with a list, sums the elements of the list
I was hoping that the FunnySum1 below would work, but it doesn't
multiple arguments. FunnySum2 works, but is that the best solution?
FunnySum1[k__] := Apply[Plus, If[ListQ[k], Sequence[k], k]]
FunnySum1[{1, 2, 3, 4, 5, 6}]
FunnySum2[k__] := Plus[k]
FunnySum2[k_List] := Apply[Plus, Sequence[k]]
FunnySum2[1, 2, 3, 4, 5, 6]
FunnySum2[{1, 2, 3, 4, 5, 6}]
Many thanks in advance,
Sam