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Re: Can anybody help?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg63637] Re: Can anybody help?
  • From: Bill Rowe <readnewsciv at earthlink.net>
  • Date: Sun, 8 Jan 2006 03:33:01 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

On 1/7/06 at 2:29 AM, plizak at gmail.com (plizak) wrote:

>It boggles my mind that some people call that code elegant.

>Short, yes, elegant, no.  It is far from intuitive to know what
>Position[v1, #1]&/@v3 does.  Anyone care to enlighten me?

The '&' character makes Position[v1, #1]& a pure function that computes the position of in v1 of each argument represented by #1. The /@ says to map this pure function to each of the elements of v3. So, the net result is to return a list of positions in v1 for each element of v3.
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