'\"
'\" Copyright (c) 1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\" Copyright (c) 2001 Kevin B. Kenny.  All rights reserved.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\" 
'\" RCS: @(#) $Id: lsearch.n,v 1.14 2003/03/19 23:01:12 cagney Exp $
'\" 
'\" The 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?
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'\"	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
'\"	Start of list of standard options for a Tk widget.  The
'\"	options follow on successive lines, in four 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.
'\"
'\" RCS: @(#) $Id$
'\"
'\"	# Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
.if t .wh -1.3i ^B
.nr ^l \n(.l
.ad b
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.nr )C \\n()Bu+\\w'(in/out)'u+2n
..
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..
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See the \\fBoptions\\fR manual entry for details on the standard options.
..
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Command-Line Name:	\\fB\\$1\\fR
Database Name:	\\fB\\$2\\fR
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\\$1\l'|0\(ul'\\$2
..
.TH lsearch n 8.4 Tcl "Tcl Built-In Commands"
.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
lsearch \- See if a list contains a particular element
.SH SYNOPSIS
\fBlsearch \fR?\fIoptions\fR? \fIlist pattern\fR
.BE

.SH DESCRIPTION
.PP
This command searches the elements of \fIlist\fR to see if one
of them matches \fIpattern\fR.  If so, the command returns the index
of the first matching element
.VS 8.4
(unless the options \fB\-all\fR or \fB\-inline\fR are specified.)
.VE 8.4
If not, the command returns \fB\-1\fR.  The \fIoption\fR arguments
indicates how the elements of the list are to be matched against
\fIpattern\fR and it must have one of the following values:
.TP
\fB\-all\fR
.VS 8.4
Changes the result to be the list of all matching indices (or all
matching values if \fB\-inline\fR is specified as well.)
.VE 8.4
.TP
\fB\-ascii\fR
The list elements are to be examined as ASCII strings.  This option is only
meaningful when used with \fB\-exact\fR or \fB\-sorted\fR.
.TP
\fB\-decreasing\fR
The list elements are sorted in decreasing order.  This option is only
meaningful when used with \fB\-sorted\fR.
.TP
\fB\-dictionary\fR
The list elements are to be compared using dictionary-style
comparisons.  This option is only meaningful when used with
\fB\-exact\fR or \fB\-sorted\fR.
.TP
\fB\-exact\fR
The list element must contain exactly the same string as \fIpattern\fR.
.TP
\fB\-glob\fR
\fIPattern\fR is a glob-style pattern which is matched against each list
element using the same rules as the \fBstring match\fR command.
.TP
\fB\-increasing\fR
The list elements are sorted in increasing order.  This option is only
meaningful when used with \fB\-sorted\fR.
.TP
\fB\-inline\fR
.VS 8.4
The matching value is returned instead of its index (or an empty
string if no value matches.)  If \fB\-all\fR is also specified, then
the result of the command is the list of all values that matched.
.VE 8.4
.TP
\fB\-integer\fR
The list elements are to be compared as integers.  This option is only
meaningful when used with \fB\-exact\fR or \fB\-sorted\fR.
.TP
\fB\-not\fR
.VS 8.4
This negates the sense of the match, returning the index of the first
non-matching value in the list.
.VE 8.4
.TP
\fB\-real\fR
The list elements are to be compared as floating-point values.  This
option is only meaningful when used with \fB\-exact\fR or \fB\-sorted\fR.
.TP
\fB\-regexp\fR
\fIPattern\fR is treated as a regular expression and matched against
each list element using the rules described in the \fBre_syntax\fR
reference page.
.TP
\fB\-sorted\fR
The list elements are in sorted order.  If this option is specified,
\fBlsearch\fR will use a more efficient searching algorithm to search
\fIlist\fR.  If no other options are specified, \fIlist\fR is assumed
to be sorted in increasing order, and to contain ASCII strings.  This
option is mutually exclusive with \fB\-glob\fR and \fB\-regexp\fR, and
is treated exactly like \fB-exact\fR when either \fB\-all\fR, or
\fB\-not\fR is specified.
.TP
\fB\-start\fR \fIindex\fR
.VS 8.4
The list is searched starting at position \fIindex\fR.  If \fIindex\fR
has the value \fBend\fR, it refers to the last element in the list,
and \fBend\-\fIinteger\fR refers to the last element in the list minus
the specified integer offset.
.VE 8.4
.PP
If \fIoption\fR is omitted then it defaults to \fB\-glob\fR.  If more
than one of \fB\-exact\fR, \fB\-glob\fR, \fB\-regexp\fR, and
\fB\-sorted\fR is specified, whichever option is specified last takes
precedence.  If more than one of \fB\-ascii\fR, \fB\-dictionary\fR,
\fB\-integer\fR and \fB\-real\fR is specified, the option specified
last takes precedence.  If more than one of \fB\-increasing\fR and
\fB\-decreasing\fR is specified, the option specified last takes
precedence.

.VS 8.4
.SH EXAMPLES
.CS
lsearch {a b c d e} c => 2
lsearch -all {a b c a b c} c => 2 5
lsearch -inline {a20 b35 c47} b* => b35
lsearch -inline -not {a20 b35 c47} b* => a20
lsearch -all -inline -not {a20 b35 c47} b* => a20 c47
lsearch -all -not {a20 b35 c47} b* => 0 2
lsearch -start 3 {a b c a b c} c => 5
.CE
.VE 8.4

.SH "SEE ALSO"
.VS 8.4
foreach(n), list(n), lappend(n), lindex(n), linsert(n), llength(n), 
lset(n), lsort(n), lrange(n), lreplace(n)
.VE

.SH KEYWORDS
list, match, pattern, regular expression, search, string
