Re: List searching
- To: mathgroup at smc.vnet.net
- Subject: [mg57573] Re: [mg57512] List searching
- From: Selwyn Hollis <sh2.7183 at earthlink.net>
- Date: Wed, 1 Jun 2005 06:02:41 -0400 (EDT)
- References: <200505310859.EAA03316@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
On May 31, 2005, at 4:59 AM, Guy Israeli wrote: > Hello, > > I needed to test lists for certain elements inside of it, however, > since I > didn't find the proper function I had to write them myself. > > are there functions that can do the following: > > - tests (returns true or false) if within the list there is an > element that > appears more than once Try this: redundancy[ alist_] := Length[ alist] != Length[ Union[ alist ] ] > > - tests if there is an element in the list that is bigger/smaller > than a > certain number containsGreater[ alist_, x_] := Max[ alist ] > x containsLesser[ alist_ , x_] := Min[ alist ] < x ------------ Selwyn Hollis http://www.appliedsymbols.com