Re: transforming a rule of lists to a list of rules
- To: mathgroup at smc.vnet.net
- Subject: [mg69161] Re: [mg69098] transforming a rule of lists to a list of rules
- From: Ken Levasseur <klevasseur at mac.com>
- Date: Thu, 31 Aug 2006 04:39:31 -0400 (EDT)
- References: <200608301032.GAA27888@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
This doesn't test for whether the two lists have equal lengths, but
that would be easy to add:
In[15]:=
delist = #1 /. {({a__} -> {b__}) :> (Rule @@ #1 & ) /@ Transpose
[{{a}, {b}}]} &
Out[15]=
#1 /. {({a__} -> {b__}) :> (Rule @@ #1 & ) /@ Transpose[{{a}, {b}}]} &
In[16]:=
delist[{a, b, c} -> {0, 3, x}]
Out[16]=
{a -> 0, b -> 3, c -> x}
On Aug 30, 2006, at 6:32 AM, Ken Senior wrote:
> Hello everyone.
>
> Does anyone know a way to transform a rule involving a list into a
> list
> of individual rules, that is to interpret the rule elementwise? For
> example, given
>
> {a,b,c} -> {0,3,x}
>
> is there a transformation which will turn this into
>
> {a->0, b->3, c->x}
>
> Thanks for the help!
>
> Ken
>
Ken Levasseur
UMass Lowell
Please avoid sending me Word or PowerPoint attachments.
See http://www.gnu.org/philosophy/no-word-attachments.html
- References:
- transforming a rule of lists to a list of rules
- From: Ken Senior <Ken.Senior@nrl.navy.mil>
- transforming a rule of lists to a list of rules