archie/tcl7.3/doc/lappend.n
2024-05-27 16:13:40 +02:00

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'\" $Header: /user6/ouster/tcl/man/RCS/lappend.n,v 1.1 93/05/03 17:34:04 ouster Exp $ SPRITE (Berkeley)
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.so man.macros
.HS lappend tcl
.BS
'\" Note: do not modify the .SH NAME line immediately below!
.SH NAME
lappend \- Append list elements onto a variable
.SH SYNOPSIS
\fBlappend \fIvarName value \fR?\fIvalue value ...\fR?
.BE
.SH DESCRIPTION
.PP
This command treats the variable given by \fIvarName\fR as a list
and appends each of the \fIvalue\fR arguments to that list as a separate
element, with spaces between elements.
If \fIvarName\fR doesn't exist, it is created as a list with elements
given by the \fIvalue\fR arguments.
\fBLappend\fR is similar to \fBappend\fR except that the \fIvalue\fRs
are appended as list elements rather than raw text.
This command provides a relatively efficient way to build up
large lists. For example, ``\fBlappend a $b\fR'' is much
more efficient than ``\fBset a [concat $a [list $b]]\fR'' when
\fB$a\fR is long.
.SH KEYWORDS
append, element, list, variable