04-27-2009
Selecting Unique Values from many List
I have a question
I have like 19 different list which contains the name of the server but what I need is just unique ones.
First thing I need to do is just make a unique list within the list itself
i.e. delete anything that is repeated inside the list
like for example
in list1
i have
a
b
c
d
e
a
c
f
g
h
so i just need is a b c d e f g h i mean unique values which is easier anyone can do it i guess.
For the first list its ok
Like that i have 19 liist and i have to do that the same thing which is ok not that hard
the problem is now,
there should not be anything repeating in any one of those list
i.e. if something is there in the first list means that should not be in 2nd list and so on. so that means
for the first list its ok i dont need to do anything as it is after deleting the duplicates
second list I have to compare with the first list and delete if anything from the first list
third list i have to compare with first and second list and anything present in first or second list I have to delete from third list and so on upto 19 list
Plz can anyone suggest me how can i do that
let me know if anything confusing
just i want is not repeated in any one of those 19 list i hope thats pretty much clear
Thanks In advance
its serious problem im having
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LEARN ABOUT DEBIAN
lrange
lrange(3tcl) Tcl Built-In Commands lrange(3tcl)
__________________________________________________________________________________________________________________________________________________
NAME
lrange - Return one or more adjacent elements from a list
SYNOPSIS
lrange list first last
_________________________________________________________________
DESCRIPTION
List must be a valid Tcl list. This command will return a new list consisting of elements first through last, inclusive. The index values |
first and last are interpreted the same as index values for the command string index, supporting simple index arithmetic and indices rela- |
tive to the end of the list. If first is less than zero, it is treated as if it were zero. If last is greater than or equal to the number
of elements in the list, then it is treated as if it were end. If first is greater than last then an empty string is returned. Note:
"lrange list first first" does not always produce the same result as "lindex list first" (although it often does for simple fields that are
not enclosed in braces); it does, however, produce exactly the same results as "list [lindex list first]"
EXAMPLES
Selecting the first two elements:
% lrange {a b c d e} 0 1
a b
Selecting the last three elements:
% lrange {a b c d e} end-2 end
c d e
Selecting everything except the first and last element:
% lrange {a b c d e} 1 end-1
b c d
Selecting a single element with lrange is not the same as doing so with lindex:
% set var {some {elements to} select}
some {elements to} select
% lindex $var 1
elements to
% lrange $var 1 1
{elements to}
SEE ALSO
list(3tcl), lappend(3tcl), lindex(3tcl), linsert(3tcl), llength(3tcl), lsearch(3tcl), lset(3tcl), lreplace(3tcl), lsort(3tcl), string(3tcl) |
KEYWORDS
element, list, range, sublist
Tcl 7.4 lrange(3tcl)