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lreplace(n)                  Tcl Built-In Commands                 lreplace(n)

______________________________________________________________________________

NAME
       lreplace - Replace elements in a list with new elements

SYNOPSIS
       lreplace list first last ?element element ...?
______________________________________________________________________________

DESCRIPTION
       lreplace returns a new list formed by replacing one or more elements of
       list with the element arguments.  first and last are index values       |
       specifying the first and last elements of the range to replace.  The    |
       index values first and last are interpreted the same as index values    |
       for the command string index, supporting simple index arithmetic and    |
       indices relative to the end of the list.  0 refers to the first element |
       of the list, and end refers to the last element of the list.  If list   |
       is empty, then first and last are ignored.

       If first is less than zero, it is considered to refer to before the
       first element of the list.  For non-empty lists, the element indicated
       by first must exist or first must indicate before the start of the
       list.

       If last is less than first, then any specified elements will be
       inserted into the list at the point specified by first with no elements
       being deleted.

       The element arguments specify zero or more new arguments to be added to
       the list in place of those that were deleted.  Each element argument
       will become a separate element of the list.  If no element arguments
       are specified, then the elements between first and last are simply
       deleted.  If list is empty, any element arguments are added to the end
       of the list.

EXAMPLES
       Replacing an element of a list with another:
              % lreplace {a b c d e} 1 1 foo
              a foo c d e

       Replacing two elements of a list with three:
              % lreplace {a b c d e} 1 2 three more elements
              a three more elements d e

       Deleting the last element from a list in a variable:
              % set var {a b c d e}
              a b c d e
              % set var [lreplace $var end end]
              a b c d

       A procedure to delete a given element from a list:
              proc lremove {listVariable value} {
                  upvar 1 $listVariable var
                  set idx [lsearch -exact $var $value]
                  set var [lreplace $var $idx $idx]
              }

SEE ALSO
       list(n), lappend(n), lindex(n), linsert(n), llength(n), lsearch(n),
       lset(n), lrange(n), lsort(n), string(n)                                 |

KEYWORDS
       element, list, replace

Tcl                                   7.4                          lreplace(n)

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