MathGroup Archive 2000

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Re: extracting common items from a list

In a message dated 9/29/2000 1:34:42 AM, ravanrip at writes:

>Hi,  How would i go about selecting common things from 2 different
>If i have  V = {v$234Period <= 10, v$235Period > v$234Period,
>v$234Period >=5}
>and  W = {v$234Period}
>I would get a new list   X = {v$234Period <= 10, v$234Period >=5}
>Notice that im only interested in inequalities whose left hand side
>contains one of the elements in W.

Select[V, MemberQ[W, #[[1]]] &]

Bob Hanlon

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