linsert - Insert elements into a list
linsert list index ?
element element ...?
This command produces a new list from
list by inserting all of the
element arguments just before the
index'th element of
list. Each
element argument will become a separate element of
the new list. If
index is less than or equal to zero, then the new
elements are inserted at the beginning of the list, and if
index is
greater or equal to the length of
list, it is as if it was
end.
As with
string index, the
index value supports both simple index
arithmetic and end-relative indexing.
Subject to the restrictions that indices must refer to locations inside the list
and that the
elements will always be inserted in order, insertions are
done so that when
index is start-relative, the first
element
will be at that index in the resulting list, and when
index is
end-relative, the last
element will be at that index in the resulting
list.
Putting some values into a list, first indexing from the start and then indexing
from the end, and then chaining them together:
set oldList {the fox jumps over the dog}
set midList [ linsert $oldList 1 quick]
set newList [ linsert $midList end-1 lazy]
# The old lists still exist though...
set newerList [ linsert [linsert $oldList end-1 quick] 1 lazy]
list(3tcl),
lappend(3tcl),
lindex(3tcl),
llength(3tcl),
lsearch(3tcl),
lset(3tcl),
lsort(3tcl),
lrange(3tcl),
lreplace(3tcl),
string(3tcl)
element, insert, list