Re: match 1, replace 2
- To: mathgroup at smc.vnet.net
- Subject: [mg56227] Re: match 1, replace 2
- From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
- Date: Wed, 20 Apr 2005 05:29:57 -0400 (EDT)
- Organization: Uni Leipzig
- References: <d42khj$3ac$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
ls = {{1, 2, 3}, {4, 5}, {6, 7, 8, 9}};
ls /. {a__Integer, b_Integer} :>
{Sequence @@ Flatten[{100 + #, -1} & /@ {a}],
b}
???
Regards
Jens
"Trevor Baca" <trevorbaca at gmail.com> schrieb im
Newsbeitrag news:d42khj$3ac$1 at smc.vnet.net...
> hi mathgroup,
>
> what rule takes
>
> ls = {{1, 2, 3}, {4, 5}, {6, 7, 8, 9}}
>
> to
>
> {{101, -1, 102, -1, 3}, {104, -1, 5},
> {106, -1, 107, -1, 108, -1,
> 9}}
>
> ie, matches all integers but the last in each
> list and then replaces
> each matched integer n with the 2-element
> sequence Sequence[100 + n,
> -1]?
>
> trevor.
>