Re: newbie list question
- To: mathgroup at smc.vnet.net
- Subject: [mg115021] Re: newbie list question
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Tue, 28 Dec 2010 06:52:25 -0500 (EST)
On 26 Dec 2010, at 10:02, Gareth Edwards wrote:
> Hi,
>
> Liking Mathematica a lot, but struggling with the early part of the learning curve, i.e. don't know what I don't know...
>
> What would be the neatest syntax for finding the first location of elements from one list in another? For example:
>
> listA == { 4,5,8,2,6,4 }
> listB == { 8,4,2 }
>
>
> I would like a function to return {3,1,4} in this case (the first location in A of each element in B)
>
> Many thanks!
>
For example:
Position[listA, #, 1, 1] & /@ listB // Flatten
{3,1,4}
Andrzej Kozlowski