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Re: Intersection problem


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?




Try this:

Select[{{a, x}, {b, y}, {c, z}}, MemberQ[{b, c, d}, #[[1]]] &]

{{b, y}, {c, z}}

Have fun.


Alexei BOULBITCH, Dr., habil.
IEE S.A.
ZAE Weiergewan,
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Office fax:       +352-2454-3566
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e-mail: alexei.boulbitch at iee.lu






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