Re: Intersection problem
- To: mathgroup at smc.vnet.net
- Subject: [mg125992] Re: Intersection problem
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Wed, 11 Apr 2012 18:21:32 -0400 (EDT)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
On 4/10/12 at 2:27 AM, travlorf at yahoo.com (Cisco Lane) wrote:
>I need to select out the elements of the first list whose first
>elements are contained in the second list. For example
>first list: {{a,x},{b,y},{c,z}}
>second list: {b,c,d}
>result: {{b,y},{c,z}}
>Is there a quick way to do this? Intersection, maybe somehow?
In[1]:= Cases[{{a, x}, {b, y}, {c,
z}}, _?(Intersection[#, {b, c, d}] != {} &)]
Out[1]= {{b, y}, {c, z}}