Re: Getting stuck with finding an elegant solution without global variables

*To*: mathgroup at smc.vnet.net*Subject*: [mg124826] Re: Getting stuck with finding an elegant solution without global variables*From*: David Reiss <dbreiss at gmail.com>*Date*: Wed, 8 Feb 2012 05:32:55 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <jgqpmc$n0p$1@smc.vnet.net>

Perhaps something like this using MapIndexed? In[1]:= Function[x, MapIndexed[ff[#1, ReplacePart[x, #2[[1]] -> Sequence[]]] &, x]][{a, b, c, d}] Out[1]= {ff[a, {b, c, d}], ff[b, {a, c, d}], ff[c, {a, b, d}], ff[d, {a, b, c}]} --David On Feb 7, 4:08 am, Fredob <fredrik.dob... at gmail.com> wrote: > Hi, > > I am trying to find an elegant solution, i.e. without a global > variable to the following problem: > > Given a list, e.g. {1,2,3,4}, create a new list where each element is > a function of the "i th" element and the rest of the list, e.g. > > Branch[Elem_, List_] := Elem + Cases[List, Except[Elem]] > > The the result would be {{3, 4, 5}, {3, 5, 6}, {4, 5, 7}, {5, 6, 7}} > > I have used Map[f, List] but then I have to use a global variable in f > to access the list itself, e.g. BranchG[Elem_] := Elem + Cases[List, > Except[Elem]]