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Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: new functional operator
Replies: 27   Last Post: Jun 3, 2012 5:05 AM

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roby.nowak@gmail.com

Posts: 74
Registered: 5/8/07
Re: new functional operator
Posted: Mar 8, 2012 4:40 AM
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On 4 Mrz., 10:37, noqsiaerosp...@gmail.com wrote:
> On Saturday, March 3, 2012 8:52:46 PM UTC+9, roby wrote:
> > Dear Group and Mathematica staff.
>
> > In the functional programming spirit I am missing a postfix notation
> > for Map[ ].
>
> How about:
>
> RightVector[a_,f_]:=Map[f, a]
> RightVector[a_,more__]:=RightVector[Map[{more}[[1]],a],Sequence@@Drop[{more },1]]
>
> Then:
>
> {1,2,3}\[RightVector](#^2&)\[RightVector]g
>
> yields:
>
> {g[1],g[4],g[9]}
>
> (it looks nicer in a notebook)

... sorry for flooding the group, but got it even nicer:

RightVector[a_, first_, rest___] := If[rest === Null, first /@ a,
RightVector[first /@ a, rest]]

Robert

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