'\" '\" Copyright (c) 1993 The Regents of the University of California. '\" Copyright (c) 1994-1996 Sun Microsystems, Inc. '\" '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" '\" RCS: @(#) $Id: concat.n,v 1.11.2.1 2009/04/27 12:35:01 dkf Exp $ '\" .so man.macros .TH concat n 8.3 Tcl "Tcl Built-In Commands" .BS '\" Note: do not modify the .SH NAME line immediately below! .SH NAME concat \- Join lists together .SH SYNOPSIS \fBconcat\fI \fR?\fIarg arg ...\fR? .BE .SH DESCRIPTION .PP This command joins each of its arguments together with spaces after trimming leading and trailing white-space from each of them. If all the arguments are lists, this has the same effect as concatenating them into a single list. It permits any number of arguments; if no \fIarg\fRs are supplied, the result is an empty string. .SH EXAMPLES Although \fBconcat\fR will concatenate lists, flattening them in the process (so giving the following interactive session): .PP .CS \fI%\fR \fBconcat\fR a b {c d e} {f {g h}} \fIa b c d e f {g h}\fR .CE .PP it will also concatenate things that are not lists, as can be seen from this session: .PP .CS \fI%\fR \fBconcat\fR " a b {c " d " e} f" \fIa b {c d e} f\fR .CE .PP Note also that the concatenation does not remove spaces from the middle of values, as can be seen here: .PP .CS \fI%\fR \fBconcat\fR "a b c" { d e f } \fIa b c d e f\fR .CE .PP (i.e., there are three spaces between each of the \fBa\fR, the \fBb\fR and the \fBc\fR). .SH "SEE ALSO" append(n), eval(n), join(n) .SH KEYWORDS concatenate, join, lists