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