How to delete an array element?

[Piche Jean]

How does one get rid of an array element. It seems that once the array is created
all elements in it become permanent. You can change an element's value, but you
cant delete the element...

Any clues besides rewritting the whole array?

Thanks

JP

--
_____________________________________________________________________________
Jean Piche
Musique - UdM
pic...@ERE.Umontreal.ca

[John Ellson]

In article <pichej.8...@mistral.ere.umontreal.ca>,

Piche Jean <pic...@ERE.UMontreal.CA> wrote:
>
>How does one get rid of an array element. It seems that once the array
>is created all elements in it become permanent. You can change an
>element's value, but you cant delete the element...

Use "unset" to delete an element, or any other variable.

% set a(1) one
one
% set a(2) two
two
% array names a
1 2
% unset a(2)
% array names a
1
%

John Ellson
AT&T Bell Labs
--
John....@att.com

[Bill Semler]

In article <pichej.8...@mistral.ERE.UMontreal.CA>,
pic...@ERE.UMontreal.CA says...

>
>
>How does one get rid of an array element. It seems that once the array
is create
>d
>all elements in it become permanent. You can change an element's value,
but you
>cant delete the element...
>

>Any clues besides rewritting the whole array?
>
>Thanks
>
>JP
>
>--
>________________________________________________________________________
_____
> Jean
Piche
> Musique
- UdM
>
pic...@ERE.Umontreal.ca

try the unset command as in:

unset arrayname(elementname)

tcl takes care of the rest - simple, no?

Bill Semler
wse...@epix.net

[Jeffrey Hobbs]

In article <pichej.8...@mistral.ERE.UMontreal.CA>,

Piche Jean <pic...@ERE.UMontreal.CA> wrote:
>How does one get rid of an array element.

unset works on array elements too. Just use 'unset ary(elem)'.
--
Jeffrey Hobbs Office: 503/346-3998
Univ of Oregon CIS GTF email: jho...@cs.uoregon.edu
URL: http://www.cs.uoregon.edu/~jhobbs/

[Eric Vought]

> >all elements in it become permanent. You can change an element's value, but you
> >cant delete the element...
>
> >Any clues besides rewritting the whole array?
>

> This is just off the top of my head but why not
>
> set A(1) "hi there"
> set A(2) "all you folks"
>
> unset A(2)
>
> I can't verify this from home but that's my first thought. Any one else?

You CAN unset variables, array variables, and individual array elements
using unset.

set A foo
set B(foo)
set B(bar)
set B(baz)

unset A
unset B(foo)
unset B

All three of these work.

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