28 lines
1.7 KiB
HTML
28 lines
1.7 KiB
HTML
|
<HTML><HEAD><TITLE>Built-In Commands - lappend manual page</TITLE></HEAD><BODY>
|
||
|
|
<H3><A NAME="M2">NAME</A></H3>
|
||
|
|
lappend - Append list elements onto a variable
|
||
|
|
<H3><A NAME="M3">SYNOPSIS</A></H3>
|
||
|
|
<B>lappend </B><I>varName </I>?<I>value value value ...</I>?<BR>
|
||
|
|
<H3><A NAME="M4">DESCRIPTION</A></H3>
|
||
|
|
This command treats the variable given by <I>varName</I> as a list
|
||
|
|
and appends each of the <I>value</I> arguments to that list as a separate
|
||
|
|
element, with spaces between elements.
|
||
|
|
If <I>varName</I> doesn't exist, it is created as a list with elements
|
||
|
|
given by the <I>value</I> arguments.
|
||
|
|
<B>Lappend</B> is similar to <B><A HREF="../TkCmd/append.htm">append</A></B> except that the <I>value</I>s
|
||
|
|
are appended as list elements rather than raw text.
|
||
|
|
This command provides a relatively efficient way to build up
|
||
|
|
large lists. For example, ``<B>lappend a $b</B>'' is much
|
||
|
|
more efficient than ``<B>set a [concat $a [list $b]]</B>'' when
|
||
|
|
<B>$a</B> is long.
|
||
|
|
|
||
|
|
<H3><A NAME="M5">SEE ALSO</A></H3>
|
||
|
|
<B><A HREF="../TkCmd/list.htm">list</A></B>, <B><A HREF="../TkCmd/lindex.htm">lindex</A></B>, <B><A HREF="../TkCmd/linsert.htm">linsert</A></B>, <B><A HREF="../TkCmd/llength.htm">llength</A></B>, <B><A HREF="../TkCmd/lsort.htm">lsort</A></B>, <B><A HREF="../TkCmd/lrange.htm">lrange</A></B>
|
||
|
|
<H3><A NAME="M6">KEYWORDS</A></H3>
|
||
|
|
<A href="../Keywords/A.htm#append">append</A>, <A href="../Keywords/E.htm#element">element</A>, <A href="../Keywords/L.htm#list">list</A>, <A href="../Keywords/V.htm#variable">variable</A>
|
||
|
|
<HR><PRE>
|
||
|
|
<A HREF="../copyright.htm">Copyright</A> © 1993 The Regents of the University of California.
|
||
|
|
<A HREF="../copyright.htm">Copyright</A> © 1994-1996 Sun Microsystems, Inc.
|
||
|
|
<A HREF="../copyright.htm">Copyright</A> © 1995-1997 Roger E. Critchlow Jr.</PRE>
|
||
|
|
</BODY></HTML>
|