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* Raise statement normalization in Lib/test/.Collin Winter2007-08-291-1/+1
* Make test_cgi pass. I changed the internal file created by make_file()Guido van Rossum2007-08-281-2/+2
* Changes in anticipation of stricter str vs. bytes enforcement.Guido van Rossum2007-08-271-1/+1
* SF patch# 1770008 by Christian Heimes (plus some extras).Guido van Rossum2007-08-091-3/+3
* Merged revisions 56125-56153 via svnmerge fromGuido van Rossum2007-07-031-2/+3
* Merged revisions 55817-55961 via svnmerge fromGuido van Rossum2007-06-131-1/+1
* - PEP 3106: dict.iterkeys(), .iteritems(), .itervalues() are now gone;Guido van Rossum2007-02-111-3/+1
* SF patch 1631942 by Collin Winter:Guido van Rossum2007-01-101-1/+1
* Four months of trunk changes (including a few releases...)Thomas Wouters2006-12-131-125/+135
* Restructure comparison dramatically. There is no longer a defaultGuido van Rossum2006-08-241-10/+8
* Merge current trunk into p3yk. This includes the PyNumber_Index API change,Thomas Wouters2006-08-211-0/+69
* Get rid of dict.has_key(). Boy this has a lot of repercussions!Guido van Rossum2006-08-181-2/+2
* Removed use of 'cgi.initlog()' - the first call to cgi.log is actuallyAnthony Baxter2004-08-031-1/+0
* Don't return spurious empty fields if 'keep_empty_values' is True.Neil Schemenauer2004-07-191-2/+21
* Complete the absolute import patch for the test suite. All relativeBarry Warsaw2002-07-301-1/+1
* This patch removes all uses of "assert" in the regression test suiteMarc-André Lemburg2001-01-171-27/+28
* Fix a bizarre typo in the helper class ComparableException: theGuido van Rossum2001-01-171-1/+1
* Make reindent.py happy (convert everything to 4-space indents!).Fred Drake2000-10-231-3/+3
* fix bug #110661 (PR#356) -- accept either & or ; as separator for CGIJeremy Hylton2000-09-151-0/+5
* Closing patch #101120 -- After everyone agreed.Moshe Zadka2000-08-251-3/+13
* test the non-multipart sections of the cgi moduleJeremy Hylton2000-08-031-0/+172
_4_synthetic Tcl is a high-level, general-purpose, interpreted, dynamic programming language. It was designed with the goal of being very simple but powerful.
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path: root/doc/unset.n
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'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\" Copyright (c) 2000 Ajuba Solutions.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\" 
'\" RCS: @(#) $Id: unset.n,v 1.13 2007/12/13 15:22:33 dgp Exp $
'\" 
.so man.macros
.TH unset n 8.4 Tcl "Tcl Built-In Commands"
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
unset \- Delete variables
.SH SYNOPSIS
\fBunset \fR?\fI\-nocomplain\fR? ?\fI\-\-\fR? ?\fIname name name ...\fR?
.BE
.SH DESCRIPTION
.PP
This command removes one or more variables.
Each \fIname\fR is a variable name, specified in any of the
ways acceptable to the \fBset\fR command.
If a \fIname\fR refers to an element of an array then that
element is removed without affecting the rest of the array.
If a \fIname\fR consists of an array name with no parenthesized
index, then the entire array is deleted.
The \fBunset\fR command returns an empty string as result.
If \fI\-nocomplain\fR is specified as the first argument, any possible
errors are suppressed.  The option may not be abbreviated, in order to
disambiguate it from possible variable names.  The option \fI\-\-\fR
indicates the end of the options, and should be used if you wish to
remove a variable with the same name as any of the options.
If an error occurs, any variables after the named one causing the error not
deleted.  An error can occur when the named variable does not exist, or the
name refers to an array element but the variable is a scalar, or the name
refers to a variable in a non-existent namespace.
.SH EXAMPLE
Create an array containing a mapping from some numbers to their
squares and remove the array elements for non-prime numbers:
.CS
array set squares {
    1 1    6 36
    2 4    7 49
    3 9    8 64
    4 16   9 81
    5 25  10 100
}

puts "The squares are:"
parray squares

\fBunset\fR squares(1) squares(4) squares(6)
\fBunset\fR squares(8) squares(9) squares(10)

puts "The prime squares are:"
parray squares
.CE
.SH "SEE ALSO"
set(n), trace(n), upvar(n)
.SH KEYWORDS
remove, variable