egghelp/eggheads community

Removing duplicate or more elements from a list.

2005-06-21T04:07:49-04:00

Ah thanks, I didn't bother to lookup lsort. I know what it is used to arranging elements in some order and sorting them didn't know about the 'unique' switch. I'll give it a go, this is more simpler and easier.

Statistics: Posted by awyeah — Tue Jun 21, 2005 4:07 am

Removing duplicate or more elements from a list.

2005-06-21T03:56:44-04:00

amazingly simple as it may sound, yet valid and effective:

Code:

proc remdum alist {   return [lsort -unique $alist]}

Statistics: Posted by demond — Tue Jun 21, 2005 3:56 am

Removing duplicate or more elements from a list.

2005-06-21T03:32:22-04:00

Yeah I had that in mind actually, posted that earlier and above. Some one told me a way like:

Code:

[lreplace $mylist [lsearch -exact $mylist $element] [lsearch -exact $mylist $element]]

Or it was something similar to something like this -- wanted to do it with lreplace.

Statistics: Posted by awyeah — Tue Jun 21, 2005 3:32 am

Removing duplicate or more elements from a list.

2005-06-21T03:12:34-04:00

looping through the list, adding current element to another list after checking whether it's already there:

Code:

proc remdup alist {   set blist {}   foreach elem $alist {      if {[lsearch -exact $blist $elem] == -1} {         lappend blist $elem      }    }   return blist}

on a side note, [lset] has been introduced only recently (in Tcl 8.3 or 8.4 I believe), so it's not so good idea to use it in a general purpose script

Statistics: Posted by demond — Tue Jun 21, 2005 3:12 am

Removing duplicate or more elements from a list.

2005-06-21T03:09:22-04:00

Something like this:

Code:

set mynewlist [list]foreach element $mylist { if {[lsearch -exact [string tolower $mylist] [string tolower $element]] == -1} {  lappend mynewlist $element  }}

Someone has something better maybe?

Statistics: Posted by awyeah — Tue Jun 21, 2005 3:09 am

Removing duplicate or more elements from a list.

2005-06-21T02:52:43-04:00

What is the best and easiest way to remove 2 or more than 2 duplicate elements from a list? LREPLACE? LSET? and how?

Statistics: Posted by awyeah — Tue Jun 21, 2005 2:52 am