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+'\"
+'\" Copyright (c) 1993-1994 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.
+'\" 
+.\" The -*- nroff -*- definitions below are for supplemental macros used
+.\" in Tcl/Tk manual entries.
+.\"
+.\" .AP type name in/out ?indent?
+.\"	Start paragraph describing an argument to a library procedure.
+.\"	type is type of argument (int, etc.), in/out is either "in", "out",
+.\"	or "in/out" to describe whether procedure reads or modifies arg,
+.\"	and indent is equivalent to second arg of .IP (shouldn't ever be
+.\"	needed;  use .AS below instead)
+.\"
+.\" .AS ?type? ?name?
+.\"	Give maximum sizes of arguments for setting tab stops.  Type and
+.\"	name are examples of largest possible arguments that will be passed
+.\"	to .AP later.  If args are omitted, default tab stops are used.
+.\"
+.\" .BS
+.\"	Start box enclosure.  From here until next .BE, everything will be
+.\"	enclosed in one large box.
+.\"
+.\" .BE
+.\"	End of box enclosure.
+.\"
+.\" .CS
+.\"	Begin code excerpt.
+.\"
+.\" .CE
+.\"	End code excerpt.
+.\"
+.\" .VS ?version? ?br?
+.\"	Begin vertical sidebar, for use in marking newly-changed parts
+.\"	of man pages.  The first argument is ignored and used for recording
+.\"	the version when the .VS was added, so that the sidebars can be
+.\"	found and removed when they reach a certain age.  If another argument
+.\"	is present, then a line break is forced before starting the sidebar.
+.\"
+.\" .VE
+.\"	End of vertical sidebar.
+.\"
+.\" .DS
+.\"	Begin an indented unfilled display.
+.\"
+.\" .DE
+.\"	End of indented unfilled display.
+.\"
+.\" .SO ?manpage?
+.\"	Start of list of standard options for a Tk widget. The manpage
+.\"	argument defines where to look up the standard options; if
+.\"	omitted, defaults to "options". The options follow on successive
+.\"	lines, in three columns separated by tabs.
+.\"
+.\" .SE
+.\"	End of list of standard options for a Tk widget.
+.\"
+.\" .OP cmdName dbName dbClass
+.\"	Start of description of a specific option.  cmdName gives the
+.\"	option's name as specified in the class command, dbName gives
+.\"	the option's name in the option database, and dbClass gives
+.\"	the option's class in the option database.
+.\"
+.\" .UL arg1 arg2
+.\"	Print arg1 underlined, then print arg2 normally.
+.\"
+.\" .QW arg1 ?arg2?
+.\"	Print arg1 in quotes, then arg2 normally (for trailing punctuation).
+.\"
+.\" .PQ arg1 ?arg2?
+.\"	Print an open parenthesis, arg1 in quotes, then arg2 normally
+.\"	(for trailing punctuation) and then a closing parenthesis.
+.\"
+.\"	# Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
+.if t .wh -1.3i ^B
+.nr ^l \n(.l
+.ad b
+.\"	# Start an argument description
+.de AP
+.ie !"\\$4"" .TP \\$4
+.el \{\
+.   ie !"\\$2"" .TP \\n()Cu
+.   el          .TP 15
+.\}
+.ta \\n()Au \\n()Bu
+.ie !"\\$3"" \{\
+\&\\$1 \\fI\\$2\\fP (\\$3)
+.\".b
+.\}
+.el \{\
+.br
+.ie !"\\$2"" \{\
+\&\\$1	\\fI\\$2\\fP
+.\}
+.el \{\
+\&\\fI\\$1\\fP
+.\}
+.\}
+..
+.\"	# define tabbing values for .AP
+.de AS
+.nr )A 10n
+.if !"\\$1"" .nr )A \\w'\\$1'u+3n
+.nr )B \\n()Au+15n
+.\"
+.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
+.nr )C \\n()Bu+\\w'(in/out)'u+2n
+..
+.AS Tcl_Interp Tcl_CreateInterp in/out
+.\"	# BS - start boxed text
+.\"	# ^y = starting y location
+.\"	# ^b = 1
+.de BS
+.br
+.mk ^y
+.nr ^b 1u
+.if n .nf
+.if n .ti 0
+.if n \l'\\n(.lu\(ul'
+.if n .fi
+..
+.\"	# BE - end boxed text (draw box now)
+.de BE
+.nf
+.ti 0
+.mk ^t
+.ie n \l'\\n(^lu\(ul'
+.el \{\
+.\"	Draw four-sided box normally, but don't draw top of
+.\"	box if the box started on an earlier page.
+.ie !\\n(^b-1 \{\
+\h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
+.\}
+.el \}\
+\h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
+.\}
+.\}
+.fi
+.br
+.nr ^b 0
+..
+.\"	# VS - start vertical sidebar
+.\"	# ^Y = starting y location
+.\"	# ^v = 1 (for troff;  for nroff this doesn't matter)
+.de VS
+.if !"\\$2"" .br
+.mk ^Y
+.ie n 'mc \s12\(br\s0
+.el .nr ^v 1u
+..
+.\"	# VE - end of vertical sidebar
+.de VE
+.ie n 'mc
+.el \{\
+.ev 2
+.nf
+.ti 0
+.mk ^t
+\h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n'
+.sp -1
+.fi
+.ev
+.\}
+.nr ^v 0
+..
+.\"	# Special macro to handle page bottom:  finish off current
+.\"	# box/sidebar if in box/sidebar mode, then invoked standard
+.\"	# page bottom macro.
+.de ^B
+.ev 2
+'ti 0
+'nf
+.mk ^t
+.if \\n(^b \{\
+.\"	Draw three-sided box if this is the box's first page,
+.\"	draw two sides but no top otherwise.
+.ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
+.el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
+.\}
+.if \\n(^v \{\
+.nr ^x \\n(^tu+1v-\\n(^Yu
+\kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c
+.\}
+.bp
+'fi
+.ev
+.if \\n(^b \{\
+.mk ^y
+.nr ^b 2
+.\}
+.if \\n(^v \{\
+.mk ^Y
+.\}
+..
+.\"	# DS - begin display
+.de DS
+.RS
+.nf
+.sp
+..
+.\"	# DE - end display
+.de DE
+.fi
+.RE
+.sp
+..
+.\"	# SO - start of list of standard options
+.de SO
+'ie '\\$1'' .ds So \\fBoptions\\fR
+'el .ds So \\fB\\$1\\fR
+.SH "STANDARD OPTIONS"
+.LP
+.nf
+.ta 5.5c 11c
+.ft B
+..
+.\"	# SE - end of list of standard options
+.de SE
+.fi
+.ft R
+.LP
+See the \\*(So manual entry for details on the standard options.
+..
+.\"	# OP - start of full description for a single option
+.de OP
+.LP
+.nf
+.ta 4c
+Command-Line Name:	\\fB\\$1\\fR
+Database Name:	\\fB\\$2\\fR
+Database Class:	\\fB\\$3\\fR
+.fi
+.IP
+..
+.\"	# CS - begin code excerpt
+.de CS
+.RS
+.nf
+.ta .25i .5i .75i 1i
+..
+.\"	# CE - end code excerpt
+.de CE
+.fi
+.RE
+..
+.\"	# UL - underline word
+.de UL
+\\$1\l'|0\(ul'\\$2
+..
+.\"	# QW - apply quotation marks to word
+.de QW
+.ie '\\*(lq'"' ``\\$1''\\$2
+.\"" fix emacs highlighting
+.el \\*(lq\\$1\\*(rq\\$2
+..
+.\"	# PQ - apply parens and quotation marks to word
+.de PQ
+.ie '\\*(lq'"' (``\\$1''\\$2)\\$3
+.\"" fix emacs highlighting
+.el (\\*(lq\\$1\\*(rq\\$2)\\$3
+..
+.\"	# QR - quoted range
+.de QR
+.ie '\\*(lq'"' ``\\$1''\\-``\\$2''\\$3
+.\"" fix emacs highlighting
+.el \\*(lq\\$1\\*(rq\\-\\*(lq\\$2\\*(rq\\$3
+..
+.\"	# MT - "empty" string
+.de MT
+.QW ""
+..
+.TH array n 8.3 Tcl "Tcl Built-In Commands"
+.BS
+'\" Note:  do not modify the .SH NAME line immediately below!
+.SH NAME
+array \- Manipulate array variables
+.SH SYNOPSIS
+\fBarray \fIoption arrayName\fR ?\fIarg arg ...\fR?
+.BE
+.SH DESCRIPTION
+.PP
+This command performs one of several operations on the
+variable given by \fIarrayName\fR.
+Unless otherwise specified for individual commands below,
+\fIarrayName\fR must be the name of an existing array variable.
+The \fIoption\fR argument determines what action is carried
+out by the command.
+The legal \fIoptions\fR (which may be abbreviated) are:
+.TP
+\fBarray anymore \fIarrayName searchId\fR
+Returns 1 if there are any more elements left to be processed
+in an array search, 0 if all elements have already been
+returned.
+\fISearchId\fR indicates which search on \fIarrayName\fR to
+check, and must have been the return value from a previous
+invocation of \fBarray startsearch\fR.
+This option is particularly useful if an array has an element
+with an empty name, since the return value from
+\fBarray nextelement\fR will not indicate whether the search
+has been completed.
+.TP
+\fBarray donesearch \fIarrayName searchId\fR
+This command terminates an array search and destroys all the
+state associated with that search.  \fISearchId\fR indicates
+which search on \fIarrayName\fR to destroy, and must have
+been the return value from a previous invocation of
+\fBarray startsearch\fR.  Returns an empty string.
+.TP
+\fBarray exists \fIarrayName\fR
+Returns 1 if \fIarrayName\fR is an array variable, 0 if there
+is no variable by that name or if it is a scalar variable.
+.TP
+\fBarray get \fIarrayName\fR ?\fIpattern\fR?
+Returns a list containing pairs of elements.  The first
+element in each pair is the name of an element in \fIarrayName\fR
+and the second element of each pair is the value of the
+array element.  The order of the pairs is undefined.
+If \fIpattern\fR is not specified, then all of the elements of the
+array are included in the result.
+If \fIpattern\fR is specified, then only those elements whose names
+match \fIpattern\fR (using the matching rules of
+\fBstring match\fR) are included.
+If \fIarrayName\fR is not the name of an array variable, or if
+the array contains no elements, then an empty list is returned.
+If traces on the array modify the list of elements, the elements
+returned are those that exist both before and after the call to
+\fBarray get\fR.
+.TP
+\fBarray names \fIarrayName\fR ?\fImode\fR? ?\fIpattern\fR?
+Returns a list containing the names of all of the elements in
+the array that match \fIpattern\fR.  \fIMode\fR may be one of
+\fB\-exact\fR, \fB\-glob\fR, or \fB\-regexp\fR.  If specified, \fImode\fR
+designates which matching rules to use to match \fIpattern\fR against
+the names of the elements in the array.  If not specified, \fImode\fR
+defaults to \fB\-glob\fR.  See the documentation for \fBstring match\fR
+for information on glob style matching, and the documentation for
+\fBregexp\fR for information on regexp matching.
+If \fIpattern\fR is omitted then the command returns all of
+the element names in the array.  If there are no (matching) elements
+in the array, or if \fIarrayName\fR is not the name of an array
+variable, then an empty string is returned.
+.TP
+\fBarray nextelement \fIarrayName searchId\fR
+Returns the name of the next element in \fIarrayName\fR, or
+an empty string if all elements of \fIarrayName\fR have
+already been returned in this search.  The \fIsearchId\fR
+argument identifies the search, and must have
+been the return value of an \fBarray startsearch\fR command.
+Warning:  if elements are added to or deleted from the array,
+then all searches are automatically terminated just as if
+\fBarray donesearch\fR had been invoked; this will cause
+\fBarray nextelement\fR operations to fail for those searches.
+.TP
+\fBarray set \fIarrayName list\fR
+Sets the values of one or more elements in \fIarrayName\fR.
+\fIlist\fR must have a form like that returned by \fBarray get\fR,
+consisting of an even number of elements.
+Each odd-numbered element in \fIlist\fR is treated as an element
+name within \fIarrayName\fR, and the following element in \fIlist\fR
+is used as a new value for that array element.
+If the variable \fIarrayName\fR does not already exist
+and \fIlist\fR is empty,
+\fIarrayName\fR is created with an empty array value.
+.TP
+\fBarray size \fIarrayName\fR
+Returns a decimal string giving the number of elements in the
+array.
+If \fIarrayName\fR is not the name of an array then 0 is returned.
+.TP
+\fBarray startsearch \fIarrayName\fR
+This command initializes an element-by-element search through the
+array given by \fIarrayName\fR, such that invocations of the
+\fBarray nextelement\fR command will return the names of the
+individual elements in the array.
+When the search has been completed, the \fBarray donesearch\fR
+command should be invoked.
+The return value is a
+search identifier that must be used in \fBarray nextelement\fR
+and \fBarray donesearch\fR commands; it allows multiple
+searches to be underway simultaneously for the same array.
+It is currently more efficient and easier to use either the \fBarray
+get\fR or \fBarray names\fR, together with \fBforeach\fR, to iterate
+over all but very large arrays.  See the examples below for how to do
+this.
+.TP
+\fBarray statistics \fIarrayName\fR
+Returns statistics about the distribution of data within the hashtable
+that represents the array.  This information includes the number of
+entries in the table, the number of buckets, and the utilization of
+the buckets.
+.TP
+\fBarray unset \fIarrayName\fR ?\fIpattern\fR?
+Unsets all of the elements in the array that match \fIpattern\fR (using the
+matching rules of \fBstring match\fR).  If \fIarrayName\fR is not the name
+of an array variable or there are no matching elements in the array, no
+error will be raised.  If \fIpattern\fR is omitted and \fIarrayName\fR is
+an array variable, then the command unsets the entire array.
+The command always returns an empty string.
+.SH EXAMPLES
+.CS
+\fBarray set\fR colorcount {
+   red   1
+   green 5
+   blue  4
+   white 9
+}
+
+foreach {color count} [\fBarray get\fR colorcount] {
+   puts "Color: $color Count: $count"
+}
+  \fB\(->\fR Color: blue Count: 4
+    Color: white Count: 9
+    Color: green Count: 5
+    Color: red Count: 1
+
+foreach color [\fBarray names\fR colorcount] {
+   puts "Color: $color Count: $colorcount($color)"
+}
+  \fB\(->\fR Color: blue Count: 4
+    Color: white Count: 9
+    Color: green Count: 5
+    Color: red Count: 1
+
+foreach color [lsort [\fBarray names\fR colorcount]] {
+   puts "Color: $color Count: $colorcount($color)"
+}
+  \fB\(->\fR Color: blue Count: 4
+    Color: green Count: 5
+    Color: red Count: 1
+    Color: white Count: 9
+
+\fBarray statistics\fR colorcount
+  \fB\(->\fR 4 entries in table, 4 buckets
+    number of buckets with 0 entries: 1
+    number of buckets with 1 entries: 2
+    number of buckets with 2 entries: 1
+    number of buckets with 3 entries: 0
+    number of buckets with 4 entries: 0
+    number of buckets with 5 entries: 0
+    number of buckets with 6 entries: 0
+    number of buckets with 7 entries: 0
+    number of buckets with 8 entries: 0
+    number of buckets with 9 entries: 0
+    number of buckets with 10 or more entries: 0
+    average search distance for entry: 1.2
+.CE
+.SH "SEE ALSO"
+list(n), string(n), variable(n), trace(n), foreach(n)
+.SH KEYWORDS
+array, element names, search