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, lappend, lindex, llength, lsearch, lset, lsort, lrange, lreplace, string
element, insert, list
Copyright © 1993 The Regents of the University of
California.
Copyright © 1994-1996 Sun Microsystems, Inc.
Copyright © 2001 Kevin B. Kenny <kennykb(at)acm.org>. All
rights reserved.