Re: delete something from a complex list
- To: mathgroup at smc.vnet.net
- Subject: [mg58093] Re: delete something from a complex list
- From: David Bailey <dave at Remove_Thisdbailey.co.uk>
- Date: Sat, 18 Jun 2005 06:07:45 -0400 (EDT)
- References: <d8u6sd$8mo$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
mark wrote:
> hi
> how to delete numbers 1 and 2 from the multilevel nested list, while preserving the structure:
> {{{{1,3,2,4}},{{5,2}}},{{4,2},{6,1,7}}}
> i hope the result is:
> {{{{3,4}},{{5}}},{{4},{6,7}}}
> i have tried delete with no success but after i have flatten the list.
> thanks
>
>
Here is yet another way to do the job:
{{{{1,3,2,4}},{{5,2}}},{{4,2},{6,1,7}}}/.{1->Sequence[],
2->Sequence[]}
I guess I just like Sequence - it lets you do so many neat tricks!
David Bailey
http://www.dbaileyconsultancy.co.uk