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