summaryrefslogtreecommitdiffstats
path: root/doc/lsort.n
diff options
context:
space:
mode:
authorrjohnson <rjohnson>1998-03-26 14:45:59 (GMT)
committerrjohnson <rjohnson>1998-03-26 14:45:59 (GMT)
commit2b5738da524e944cda39e24c0a87b745a43bd8c3 (patch)
tree6e8c9473978f6dab66c601e911721a7bd9d70b1b /doc/lsort.n
parentc6a259aeeca4814a97cf6694814c63e74e4e18fa (diff)
downloadtcl-2b5738da524e944cda39e24c0a87b745a43bd8c3.zip
tcl-2b5738da524e944cda39e24c0a87b745a43bd8c3.tar.gz
tcl-2b5738da524e944cda39e24c0a87b745a43bd8c3.tar.bz2
Initial revision
Diffstat (limited to 'doc/lsort.n')
-rw-r--r--doc/lsort.n85
1 files changed, 85 insertions, 0 deletions
diff --git a/doc/lsort.n b/doc/lsort.n
new file mode 100644
index 0000000..828cad8
--- /dev/null
+++ b/doc/lsort.n
@@ -0,0 +1,85 @@
+'\"
+'\" Copyright (c) 1993 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.
+'\"
+'\" SCCS: @(#) lsort.n 1.10 97/08/22 18:50:53
+'\"
+.so man.macros
+.TH lsort n 8.0 Tcl "Tcl Built-In Commands"
+.BS
+'\" Note: do not modify the .SH NAME line immediately below!
+.SH NAME
+lsort \- Sort the elements of a list
+.SH SYNOPSIS
+\fBlsort \fR?\fIoptions\fR? \fIlist\fR
+.BE
+
+.SH DESCRIPTION
+.PP
+This command sorts the elements of \fIlist\fR, returning a new
+list in sorted order. By default ASCII sorting is used with
+the result returned in increasing order.
+However, any of the
+following options may be specified before \fIlist\fR to
+control the sorting process (unique abbreviations are accepted):
+.TP 20
+\fB\-ascii\fR
+Use string comparison with ASCII collation order. This is
+the default.
+.VS 8.0 br
+.TP 20
+\fB\-dictionary\fR
+Use dictionary-style comparison. This is the same as \fB\-ascii\fR
+except (a) case is ignored except as a tie-breaker and (b) if two
+strings contain embedded numbers, the numbers compare as integers,
+not characters. For example, in \fB\-dictionary\fR mode, \fBbigBoy\fR
+sorts between \fBbigbang\fR and \fBbigboy\fR, and \fBx10y\fR
+sorts between \fBx9y\fR and \fBx11y\fR.
+.VE
+.TP 20
+\fB\-integer\fR
+Convert list elements to integers and use integer comparison.
+.TP 20
+\fB\-real\fR
+Convert list elements to floating-point values and use floating
+comparison.
+.TP 20
+\fB\-command\0\fIcommand\fR
+Use \fIcommand\fR as a comparison command.
+To compare two elements, evaluate a Tcl script consisting of
+\fIcommand\fR with the two elements appended as additional
+arguments. The script should return an integer less than,
+equal to, or greater than zero if the first element is to
+be considered less than, equal to, or greater than the second,
+respectively.
+.TP 20
+\fB\-increasing\fR
+Sort the list in increasing order (``smallest'' items first).
+This is the default.
+.TP 20
+\fB\-decreasing\fR
+Sort the list in decreasing order (``largest'' items first).
+.VS 8.0 br
+.TP 20
+\fB\-index\0\fIindex\fR
+If this option is specified, each of the elements of \fIlist\fR must
+itself be a proper Tcl sublist. Instead of sorting based on whole sublists,
+\fBlsort\fR will extract the \fIindex\fR'th element from each sublist
+and sort based on the given element. The keyword \fBend\fP is allowed
+for the \fIindex\fP to sort on the last sublist element. For example,
+.RS
+.CS
+lsort -integer -index 1 {{First 24} {Second 18} {Third 30}}
+.CE
+returns \fB{Second 18} {First 24} {Third 30}\fR.
+This option is much more efficient than using \fB\-command\fR
+to achieve the same effect.
+.RE
+.VE
+
+
+.SH KEYWORDS
+element, list, order, sort