linsert(n) Tcl Built-In Commands linsert(n)
NAME
linsert - Insert elements into a list
SYNOPSIS
linsert list index ?element element ...?
DESCRIPTION
This command produces a new list from list by inserting all of the ele-
ment 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, inser-
tions 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-rel-
ative, the last element will be at that index in the resulting list.
EXAMPLE
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]
SEE ALSO
list(n), lappend(n), lindex(n), llength(n), lsearch(n), lset(n),
lsort(n), lrange(n), lreplace(n), string(n)
KEYWORDS
element, insert, list
Tcl 8.2 linsert(n)
tcl 8.6.0 - Generated Wed Jan 9 18:18:50 CST 2013