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Groups > comp.soft-sys.math.mathematica > #14991
| From | Ray Koopman <koopman@sfu.ca> |
|---|---|
| Newsgroups | comp.soft-sys.math.mathematica |
| Subject | Re: bug or feature ? |
| Date | 2013-06-24 07:52 +0000 |
| Message-ID | <kq8tru$8ou$1@smc.vnet.net> (permalink) |
| Organization | Time-Warner Telecom |
Position[{{1, 2}, {2, 3}, {1, 4}}, _?(EvenQ[#[[2]]] &), {1}, Heads->False]
{{1},{3}}
Position[{{1, 2}, {2, 3}, {1, 4}}, {__}?(EvenQ[#[[2]]] &), {1}]
{{1},{3}}
Position[{{1, 2}, {2, 3}, {1, 4}}, _List?(EvenQ[#[[2]]] &), {1}]
{{1},{3}}
----- roby <roby.nowak@gmail.com> wrote:
> Dear Group
>
> When trying to evaluate the following code the expected result is returned.
> But strangly there is an error message generated.
> The code should (and does) return the positions of all sublists with an even element at the second position.
>
> Position[{{1, 2}, {2, 3}, {1, 4}}, _?(EvenQ[#[[2]]] &), {1}]
>
> Part::partd: Part specification List[[2]] is longer than depth of object. >>
>
> {{1}, {3}}
>
>
> Any hints if this a bug or a feature ?
>
> Regards Robert
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Re: bug or feature ? Ray Koopman <koopman@sfu.ca> - 2013-06-24 07:52 +0000
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