Re: functional programming excercise from Mastering Mathematica
- To: mathgroup at smc.vnet.net
- Subject: [mg55301] Re: functional programming excercise from Mastering Mathematica
- From: Luis Rademacher <lrademac at hotmail.com>
- Date: Fri, 18 Mar 2005 05:35:12 -0500 (EST)
- References: <d1bflp$lja$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
fl[f_, x_, a_List] := ComposeList[Map[(Function[y, f[y, #]]) &, a], x] Luis. Torsten Coym wrote: > I'm quite new to Mathematica and its functional programming capabilities > so I did some reading in John Gray's "Mastering Mathematica". There is > an excercise in chapter 6 as follows > > Write your own function composeList that works just like the built-in > operation with the same name, using FoldList. Conversely, write your own > function foldList that works just like the built-in operation with the > same name, using ComposeList. > > Unfortunately, there is no solution given at the end of the book (or I > didn't find it). I could figure out a way to do the first task: > > composeList[funlist_List, var_] := FoldList[(#2[#1]) &, var, funlist] > > but I can't manage the second task... > > I know it's rather academic, but ... any help is welcome! > > Torsten >