# Multidimensional ".index"?

Hi,

a=[1,2,3,4]
a.index(3) -> 2

Is there any way to do such things:

a=[[1,2,3,4],[5,6,7,8],[9,10,11,12]]

a.index(6) -> [1,1]

may be for n-dimensional arrays, too ?

Keep ruby!
mcc

From: [email protected]
Subject: Re: Multidimensional “.index” ?
Date: Fri, 23 Jun 2006 11:35:10 +0900

harp:~ > cat a.rb
p na[idx]

`````` [ 0, 0, 0, 1 ] ]
``````

and so much more. it’s all on rubyforge.

## -a

suffering increases your inner strength. also, the wishing for suffering
makes the suffering disappear.

• h.h. the 14th dali lama

THANK YOU! :))

Have a nice weekend!
mcc

On Fri, 23 Jun 2006, Meino Christian C. wrote:

may be for n-dimensional arrays, too ?

Keep ruby!
mcc

harp:~ > cat a.rb
require ‘narray’

na = NArray.to_na [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
]

idx = na.eq 7
p idx
p na[idx]

idx = na.eq(7).or(na.eq(12))
p idx
p na[idx]

idx = na.gt 6
p idx
p na[idx]

harp:~ > ruby a.rb
NArray.byte(4,3):
[ [ 0, 0, 0, 0 ],
[ 0, 0, 1, 0 ],
[ 0, 0, 0, 0 ] ]
NArray.int(1):
[ 7 ]
NArray.byte(4,3):
[ [ 0, 0, 0, 0 ],
[ 0, 0, 1, 0 ],
[ 0, 0, 0, 1 ] ]
NArray.int(2):
[ 7, 12 ]
NArray.byte(4,3):
[ [ 0, 0, 0, 0 ],
[ 0, 0, 1, 1 ],
[ 1, 1, 1, 1 ] ]
NArray.int(6):
[ 7, 8, 9, 10, 11, 12 ]

and so much more. it’s all on rubyforge.

-a