added -D to alter sort order to descending order (default: ascending)

TODO.md

@@ -2,8 +2,6 @@
 
 ## Features to be implemented
 
-- ability to change sort order (ascending vs descending)
-
 - sorting by: numerical, time, duration, string(default)
 
 - add output modes yaml and csv

cmd/root.go

@@ -85,7 +85,10 @@ func init() {
 	rootCmd.PersistentFlags().BoolVarP(&ShowManual, "man", "m", false, "Display manual page")
 	rootCmd.PersistentFlags().StringVarP(&lib.Separator, "separator", "s", lib.DefaultSeparator, "Custom field separator")
 	rootCmd.PersistentFlags().StringVarP(&lib.Columns, "columns", "c", "", "Only show the speficied columns (separated by ,)")
+
+	// sort options
 	rootCmd.PersistentFlags().IntVarP(&lib.SortByColumn, "sort-by", "k", 0, "Sort by column (default: 1)")
+	rootCmd.PersistentFlags().BoolVarP(&lib.SortDescending, "sort-desc", "D", false, "Sort in descending order (default: ascending)")
 
 	// output flags, only 1 allowed, hidden, since just short cuts
 	rootCmd.PersistentFlags().BoolVarP(&lib.OutflagExtended, "extended", "X", false, "Enable extended output")

cmd/tablizer.go

@@ -22,6 +22,7 @@ SYNOPSIS
           -O, --orgtbl             Enable org-mode table output
           -s, --separator string   Custom field separator
           -k, --sort-by int        Sort by column (default: 1)
+          -D, --sort-desc          Sort in descending order (default: ascending)
           -v, --version            Print program version
 
 DESCRIPTION
@@ -78,7 +79,8 @@ DESCRIPTION
 
     Use the -k option to specify by which column to sort the tabular data
     (as in GNU sort(1)). The default sort column is the first one. To
-    disable sorting at all, supply 0 (Zero) to -k.
+    disable sorting at all, supply 0 (Zero) to -k. The default sort order is
+    ascending. You can change this to descending order using the option -D.
 
     Finally the -d option enables debugging output which is mostly useful
     for the developer.

lib/common.go

@@ -77,6 +77,7 @@ var (
 
 	// sorting
 	SortByColumn   int
+	SortDescending bool
 )
 
 // contains a whole parsed table

lib/sort.go

@@ -41,6 +41,9 @@ func sortTable(data *Tabdata, col int) {
 
 	// actual sorting
 	sort.SliceStable(data.entries, func(i, j int) bool {
+		if SortDescending {
+			return data.entries[i][col] > data.entries[j][col]
+		}
 		return data.entries[i][col] < data.entries[j][col]
 	})
 }

tablizer.1

@@ -160,6 +160,7 @@ tablizer \- Manipulate tabular output of other programs
 \&      \-O, \-\-orgtbl             Enable org\-mode table output
 \&      \-s, \-\-separator string   Custom field separator
 \&      \-k, \-\-sort\-by int        Sort by column (default: 1)
+\&      \-D, \-\-sort\-desc          Sort in descending order (default: ascending)
 \&      \-v, \-\-version            Print program version
 .Ve
 .SH "DESCRIPTION"
@@ -225,7 +226,9 @@ highlighted. You can disable this behavior with the \fB\-N\fR option.
 .PP
 Use the  \fB\-k\fR option to specify  by which column to  sort the tabular
 data (as in \s-1GNU\s0 \fBsort\fR\|(1)). The default sort column is the first one. To
-disable sorting at all, supply 0 (Zero) to \-k.
+disable sorting at all, supply 0  (Zero) to \-k. The default sort order
+is ascending. You can change this to descending order using the option
+\&\fB\-D\fR.
 .PP
 Finally the  \fB\-d\fR option  enables debugging  output which  is mostly
 useful for the developer.

tablizer.pod

@@ -21,6 +21,7 @@ tablizer - Manipulate tabular output of other programs
       -O, --orgtbl             Enable org-mode table output
       -s, --separator string   Custom field separator
       -k, --sort-by int        Sort by column (default: 1)
+      -D, --sort-desc          Sort in descending order (default: ascending)
       -v, --version            Print program version
 
 
@@ -81,7 +82,9 @@ highlighted. You can disable this behavior with the B<-N> option.
 
 Use the  B<-k> option to specify  by which column to  sort the tabular
 data (as in GNU sort(1)). The default sort column is the first one. To
-disable sorting at all, supply 0 (Zero) to -k.
+disable sorting at all, supply 0  (Zero) to -k. The default sort order
+is ascending. You can change this to descending order using the option
+B<-D>.
 
 Finally the  B<-d> option  enables debugging  output which  is mostly
 useful for the developer.