48 lines
2.0 KiB
Plaintext
48 lines
2.0 KiB
Plaintext
'\"
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'\" Copyright (c) 1993 The Regents of the University of California.
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'\" All rights reserved.
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'\"
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'\" Permission is hereby granted, without written agreement and without
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'\" license or royalty fees, to use, copy, modify, and distribute this
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'\" documentation for any purpose, provided that the above copyright
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'\" notice and the following two paragraphs appear in all copies.
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'\"
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'\" IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
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'\" FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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'\" ARISING OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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'\" CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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'\"
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'\" THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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'\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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'\" AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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'\" ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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'\" PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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'\"
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'\" $Header: /user6/ouster/tcl/man/RCS/foreach.n,v 1.1 93/05/03 17:09:42 ouster Exp $ SPRITE (Berkeley)
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'\"
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.so man.macros
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.HS foreach tcl
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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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foreach \- Iterate over all elements in a list
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.SH SYNOPSIS
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\fBforeach \fIvarname list body\fR
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.BE
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.SH DESCRIPTION
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.PP
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In this command \fIvarname\fR is the name of a variable, \fIlist\fR
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is a list of values to assign to \fIvarname\fR, and \fIbody\fR is a
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Tcl script.
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For each element of \fIlist\fR (in order
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from left to right), \fBforeach\fR assigns the contents of the
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field to \fIvarname\fR as if the \fBlindex\fR command had been used
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to extract the field, then calls the Tcl interpreter to execute
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\fIbody\fR. The \fBbreak\fR and \fBcontinue\fR statements may be
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invoked inside \fIbody\fR, with the same effect as in the \fBfor\fR
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command. \fBForeach\fR returns an empty string.
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.SH KEYWORDS
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foreach, iteration, list, looping
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