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I was wondering if there was a more elegant way of finding whether an element exists in an N-dimensional array. The way I would do it is:

 inArrayQ[a_,el_] := If[Length@Position[a,x_/;x==el]==0,False,True];

But this seems rather cumbersome. I am surprised there is no built-in Mathematica function that does this, but if not, is there a better way to write such a function?

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    $\begingroup$ check out MemberQ $\endgroup$ – Pinguin Dirk Sep 20 '13 at 20:07
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    $\begingroup$ D'oh, if only the documentation search was better...thanks. $\endgroup$ – Guillochon Sep 20 '13 at 20:08
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    $\begingroup$ @Guillochon If you search for MemberQ you get the answer right away ;) $\endgroup$ – Dr. belisarius Sep 20 '13 at 20:31
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    $\begingroup$ @Guillochon You can also use Position to determine where the element is. $\endgroup$ – RM1618 Sep 22 '13 at 10:40
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Not to have any more open, unanswered questions

Check out MemberQ, you should find all information there.

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