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-rw-r--r--doc/lsearch.n50
1 files changed, 40 insertions, 10 deletions
diff --git a/doc/lsearch.n b/doc/lsearch.n
index b046ba2..a049b53 100644
--- a/doc/lsearch.n
+++ b/doc/lsearch.n
@@ -8,7 +8,7 @@
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
.so man.macros
-.TH lsearch n 8.5 Tcl "Tcl Built-In Commands"
+.TH lsearch n 8.6 Tcl "Tcl Built-In Commands"
.BS
'\" Note: do not modify the .SH NAME line immediately below!
.SH NAME
@@ -16,7 +16,6 @@ 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
@@ -27,24 +26,29 @@ 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 must have one of the values below:
.SS "MATCHING STYLE OPTIONS"
+.PP
If all matching style options are omitted, the default matching style
is \fB\-glob\fR. If more than one matching style is specified, the
last matching style given takes precedence.
.TP
\fB\-exact\fR
+.
\fIPattern\fR is a literal string that is compared for exact equality
against each list element.
.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\-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
@@ -53,6 +57,7 @@ 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 are specified.
.SS "GENERAL MODIFIER OPTIONS"
+.PP
These options may be given with all matching styles.
.TP
\fB\-all\fR
@@ -63,32 +68,36 @@ indices will be in numeric order. If values are returned, the order of the
values will be the order of those values within the input \fIlist\fR.
.TP
\fB\-inline\fR
+.
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.
.TP
\fB\-not\fR
+.
This negates the sense of the match, returning the index of the first
non-matching value in the list.
.TP
\fB\-start\fR\0\fIindex\fR
+.
The list is searched starting at position \fIindex\fR.
-.VS 8.5
The interpretation of the \fIindex\fR value is the same as
for the command \fBstring index\fR, supporting simple index
arithmetic and indices relative to the end of the list.
-.VE 8.5
.SS "CONTENTS DESCRIPTION OPTIONS"
+.PP
These options describe how to interpret the items in the list being
searched. They are only meaningful when used with the \fB\-exact\fR
and \fB\-sorted\fR options. If more than one is specified, the last
one takes precedence. The default is \fB\-ascii\fR.
.TP
\fB\-ascii\fR
+.
The list elements are to be examined as Unicode strings (the name is
for backward-compatibility reasons.)
.TP
\fB\-dictionary\fR
+.
The list elements are to be compared using dictionary-style
comparisons (see \fBlsort\fR for a fuller description). Note that this
only makes a meaningful difference from the \fB\-ascii\fR option when
@@ -96,49 +105,67 @@ the \fB\-sorted\fR option is given, because values are only
dictionary-equal when exactly equal.
.TP
\fB\-integer\fR
+.
The list elements are to be compared as integers.
-.VS 8.5
.TP
\fB\-nocase\fR
+.
Causes comparisons to be handled in a case-insensitive manner. Has no
effect if combined with the \fB\-dictionary\fR, \fB\-integer\fR, or
\fB\-real\fR options.
-.VE 8.5
.TP
\fB\-real\fR
+.
The list elements are to be compared as floating-point values.
.SS "SORTED LIST OPTIONS"
+.PP
These options (only meaningful with the \fB\-sorted\fR option) specify
how the list is sorted. If more than one is given, the last one takes
precedence. The default option is \fB\-increasing\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\-increasing\fR
+.
The list elements are sorted in increasing order. This option is only
meaningful when used with \fB\-sorted\fR.
+.TP
+\fB\-bisect\fR
+.VS 8.6
+Inexact search when the list elements are in sorted order. For an increasing
+list the last index where the element is less than or equal to the pattern
+is returned. For a decreasing list the last index where the element is greater
+than or equal to the pattern is returned. If the pattern is before the first
+element or the list is empty, -1 is returned.
+This option implies \fB\-sorted\fR and cannot be used with either \fB\-all\fR
+or \fB\-not\fR.
+.VE 8.6
.SS "NESTED LIST OPTIONS"
-.VS 8.5
+.PP
These options are used to search lists of lists. They may be used
with any other options.
.TP
\fB\-index\fR\0\fIindexList\fR
+.
This option is designed for use when searching within nested lists.
The \fIindexList\fR argument gives a path of indices (much as might be
used with the \fBlindex\fR or \fBlset\fR commands) within each element
to allow the location of the term being matched against.
.TP
\fB\-subindices\fR
+.
If this option is given, the index result from this command (or every
index result when \fB\-all\fR is also specified) will be a complete
path (suitable for use with \fBlindex\fR or \fBlset\fR) within the
overall list to the term found. This option has no effect unless the
\fI\-index\fR is also specified, and is just a convenience short-cut.
-.VE 8.5
.SH EXAMPLES
+.PP
Basic searching:
+.PP
.CS
\fBlsearch\fR {a b c d e} c
\fI\(-> 2\fR
@@ -147,6 +174,7 @@ Basic searching:
.CE
.PP
Using \fBlsearch\fR to filter lists:
+.PP
.CS
\fBlsearch\fR -inline {a20 b35 c47} b*
\fI\(-> b35\fR
@@ -161,18 +189,21 @@ Using \fBlsearch\fR to filter lists:
This can even do a
.QW set-like
removal operation:
+.PP
.CS
\fBlsearch\fR -all -inline -not -exact {a b c a d e a f g a} a
\fI\(-> b c d e f g\fR
.CE
.PP
Searching may start part-way through the list:
+.PP
.CS
\fBlsearch\fR -start 3 {a b c a b c} c
\fI\(-> 5\fR
.CE
.PP
It is also possible to search inside elements:
+.PP
.CS
\fBlsearch\fR -index 1 -all -inline {{a abc} {b bcd} {c cde}} *bc*
\fI\(-> {a abc} {b bcd}\fR
@@ -180,10 +211,9 @@ It is also possible to search inside elements:
.SH "SEE ALSO"
foreach(n), list(n), lappend(n), lindex(n), linsert(n), llength(n),
lset(n), lsort(n), lrange(n), lreplace(n),
-.VS 8.5
string(n)
-.VE
.SH KEYWORDS
+binary search, linear search,
list, match, pattern, regular expression, search, string
'\" Local Variables:
'\" mode: nroff