'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\" Copyright (c) 2001 Kevin B. Kenny <kennykb@acm.org>.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.TH lreplace 3tcl 7.4 Tcl "Tcl Built-In Commands"
.\" The -*- nroff -*- definitions below are for supplemental macros used
.\" in Tcl/Tk manual entries.
.\"
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.\" .SO ?manpage?
.\"	Start of list of standard options for a Tk widget. The manpage
.\"	argument defines where to look up the standard options; if
.\"	omitted, defaults to "options". The options follow on successive
.\"	lines, in three columns separated by tabs.
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.\" .SE
.\"	End of list of standard options for a Tk widget.
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.\" .OP cmdName dbName dbClass
.\"	Start of description of a specific option.  cmdName gives the
.\"	option's name as specified in the class command, dbName gives
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.\"	# Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
.if t .wh -1.3i ^B
.nr ^l \n(.l
.ad b
.\"	# Start an argument description
.de AP
.ie !"\\$4"" .TP \\$4
.el \{\
.   ie !"\\$2"" .TP \\n()Cu
.   el          .TP 15
.\}
.ta \\n()Au \\n()Bu
.ie !"\\$3"" \{\
\&\\$1 \\fI\\$2\\fP (\\$3)
.\".b
.\}
.el \{\
.br
.ie !"\\$2"" \{\
\&\\$1	\\fI\\$2\\fP
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.el \{\
\&\\fI\\$1\\fP
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.\}
..
.\"	# define tabbing values for .AP
.de AS
.nr )A 10n
.if !"\\$1"" .nr )A \\w'\\$1'u+3n
.nr )B \\n()Au+15n
.\"
.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
.nr )C \\n()Bu+\\w'(in/out)'u+2n
..
.AS Tcl_Interp Tcl_CreateInterp in/out
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.\"	# ^y = starting y location
.\"	# ^b = 1
.de BS
.br
.mk ^y
.nr ^b 1u
.if n .nf
.if n .ti 0
.if n \l'\\n(.lu\(ul'
.if n .fi
..
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.de BE
.nf
.ti 0
.mk ^t
.ie n \l'\\n(^lu\(ul'
.el \{\
.\"	Draw four-sided box normally, but don't draw top of
.\"	box if the box started on an earlier page.
.ie !\\n(^b-1 \{\
\h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
.\}
.el \}\
\h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
.\}
.\}
.fi
.br
.nr ^b 0
..
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.\"	# ^v = 1 (for troff;  for nroff this doesn't matter)
.de VS
.if !"\\$2"" .br
.mk ^Y
.ie n 'mc \s12\(br\s0
.el .nr ^v 1u
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.de VE
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.el \{\
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\h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n'
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.de ^B
.ev 2
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.if \\n(^b \{\
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.\"	draw two sides but no top otherwise.
.ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
.el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
.\}
.if \\n(^v \{\
.nr ^x \\n(^tu+1v-\\n(^Yu
\kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c
.\}
.bp
'fi
.ev
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..
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.de DE
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.RE
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..
.\"	# SO - start of list of standard options
.de SO
'ie '\\$1'' .ds So \\fBoptions\\fR
'el .ds So \\fB\\$1\\fR
.SH "STANDARD OPTIONS"
.LP
.nf
.ta 5.5c 11c
.ft B
..
.\"	# SE - end of list of standard options
.de SE
.fi
.ft R
.LP
See the \\*(So manual entry for details on the standard options.
..
.\"	# OP - start of full description for a single option
.de OP
.LP
.nf
.ta 4c
Command-Line Name:	\\fB\\$1\\fR
Database Name:	\\fB\\$2\\fR
Database Class:	\\fB\\$3\\fR
.fi
.IP
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.de UL
\\$1\l'|0\(ul'\\$2
..
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.de QW
.ie '\\*(lq'"' ``\\$1''\\$2
.\"" fix emacs highlighting
.el \\*(lq\\$1\\*(rq\\$2
..
.\"	# PQ - apply parens and quotation marks to word
.de PQ
.ie '\\*(lq'"' (``\\$1''\\$2)\\$3
.\"" fix emacs highlighting
.el (\\*(lq\\$1\\*(rq\\$2)\\$3
..
.\"	# QR - quoted range
.de QR
.ie '\\*(lq'"' ``\\$1''\\-``\\$2''\\$3
.\"" fix emacs highlighting
.el \\*(lq\\$1\\*(rq\\-\\*(lq\\$2\\*(rq\\$3
..
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..
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
lreplace \- Replace elements in a list with new elements
.SH SYNOPSIS
\fBlreplace \fIlist first last \fR?\fIelement element ...\fR?
.BE
.SH DESCRIPTION
.PP
\fBlreplace\fR returns a new list formed by replacing zero or more elements of
\fIlist\fR with the \fIelement\fR arguments.
\fIfirst\fR and \fIlast\fR are index values specifying the first and
last elements of the range to replace.
The index values \fIfirst\fR and \fIlast\fR are interpreted
the same as index values for the command \fBstring index\fR,
supporting simple index arithmetic and indices relative to the
end of the list.
0 refers to the first element of the
list, and \fBend\fR refers to the last element of the list.
.PP
If either \fIfirst\fR or \fIlast\fR is less than zero, it is considered
to refer to before the first element of the list. This allows \fBlreplace\fR
to prepend elements to \fIlist\fR.
.VS TIP505
If either \fIfirst\fR or \fIlast\fR indicates a position greater than the
index of the last element of the list, it is treated as if it is an
index one greater than the last element. This allows \fBlreplace\fR to
append elements to \fIlist\fR.
.VE TIP505
.PP
If \fIlast\fR is less than \fIfirst\fR, then any specified elements
will be inserted into the list before the element specified by \fIfirst\fR
with no elements being deleted.
.PP
The \fIelement\fR arguments specify zero or more new elements to
be added to the list in place of those that were deleted.
Each \fIelement\fR argument will become a separate element of
the list.  If no \fIelement\fR arguments are specified, then the elements
between \fIfirst\fR and \fIlast\fR are simply deleted.
.SH EXAMPLES
.PP
Replacing an element of a list with another:
.PP
.CS
% \fBlreplace\fR {a b c d e} 1 1 foo
a foo c d e
.CE
.PP
Replacing two elements of a list with three:
.PP
.CS
% \fBlreplace\fR {a b c d e} 1 2 three more elements
a three more elements d e
.CE
.PP
Deleting the last element from a list in a variable:
.PP
.CS
% set var {a b c d e}
a b c d e
% set var [\fBlreplace\fR $var end end]
a b c d
.CE
.PP
A procedure to delete a given element from a list:
.PP
.CS
proc lremove {listVariable value} {
    upvar 1 $listVariable var
    set idx [lsearch -exact $var $value]
    set var [\fBlreplace\fR $var $idx $idx]
}
.CE
.PP
.VS TIP505
Appending elements to the list; note that \fBend+2\fR will initially
be treated as if it is \fB6\fR here, but both that and \fB12345\fR are greater
than the index of the final item so they behave identically:
.PP
.CS
% set var {a b c d e}
a b c d e
% set var [\fBlreplace\fR $var 12345 end+2 f g h i]
a b c d e f g h i
.CE
.VE TIP505
.SH "SEE ALSO"
list(3tcl), lappend(3tcl), lindex(3tcl), linsert(3tcl), llength(3tcl), lsearch(3tcl),
lset(3tcl), lrange(3tcl), lsort(3tcl),
string(3tcl)
.SH KEYWORDS
element, list, replace
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.\" End: