Date: 22 Jul 2003 17:46:51 GMT
From: lvirden@yahoo.com
Newsgroups: comp.lang.tcl
Subject: Re: common elements in list of list


According to Michael A. Cleverly <michael@cleverly.com>:
:On 22 Jul 2003, Sasi wrote:
:
:>        How can get the list of common elements in
the list of list? eg:
:> set x {
:>        {1 2 3 4 5 6}
:>        {6 7 8 9 5 1}
:>        {1 2 7 5 8 9}
:>       }
:>
:> the common elements in this list of list are 1 & 5
:> is there any easy way to extract them?
:
:Here's a solution off the top of my head:

Michael, would you consider possibly adding this
solution, or a derivation, to the struct::list module
of tcllib?

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Basic set operations added to CVS head, module 'struct'.

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The requested feature is 'set intersection' ... Instead of 
adding this under list I would rather add a whole section for 
set operations, and then a number of them.

File Added - 56584: list.test.patch

File Added - 56583: list.tcl.patch

File Added - 56582: struct_list.man.patch

File Added - 56581: list.tcl.patch

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I have a patch to both list.tcl (code) and struct_list.man
(documentation).