linsert(3tcl)                 Tcl Built-In Commands                linsert(3tcl)


       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

       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

Tcl                                    8.2                         linsert(3tcl)