New function table.AppendRowLine() to manually add row separators.

README.md

@@ -266,6 +266,34 @@ Note: Caption text will wrap with total width of rendered table.
 +------+-----------------------+--------+
 Movie ratings.
 ```
+#### Example   7 - Grouping by adding row lines
+```go
+table := tablewriter.NewWriter(os.Stdout)
+table.SetHeader([]string{"Food", "Rating"})
+
+table.Append([]string{"Filet Mignon", "****"})
+table.Append([]string{"New York Steak", "***"})
+
+table.AppendRowLine() // Manually add separator
+
+table.Append([]string{"Broccoli", "*"})
+table.Append([]string{"Cauliflower", "***"})
+
+table.Render() // Send output
+```
+
+##### Output  7
+```
++----------------+--------+
+|      FOOD      | RATING |
++----------------+--------+
+| Filet Mignon   | ****   |
+| New York Steak | ***    |
++----------------+--------+
+| Broccoli       | *      |
+| Cauliflower    | ***    |
++----------------+--------+
+```
 
 #### TODO
 - ~~Import Directly from CSV~~  - `done`

table.go

@@ -79,6 +79,7 @@ type Table struct {
 	columnsParams  []string
 	footerParams   []string
 	columnsAlign   []int
+	rowLineIdxs    map[int]int
 }
 
 // Start New Table
@@ -114,7 +115,9 @@ func NewWriter(writer io.Writer) *Table {
 		headerParams:  []string{},
 		columnsParams: []string{},
 		footerParams:  []string{},
-		columnsAlign:  []int{}}
+		columnsAlign:  []int{},
+		rowLineIdxs:   make(map[int]int),
+        }
 	return t
 }
 
@@ -274,6 +277,11 @@ func (t *Table) SetBorders(border Border) {
 	t.borders = border
 }
 
+// Append a separator after the current line
+func (t *Table) AppendRowLine() {
+    t.rowLineIdxs[len(t.lines)-1]++
+}
+
 // Append row to table
 func (t *Table) Append(row []string) {
 	rowSize := len(t.headers)
@@ -672,6 +680,12 @@ func (t *Table) printRow(columns [][]string, rowIdx int) {
 	if t.rowLine {
 		t.printLine(true)
 	}
+
+	// Any manually added row lines?
+	for t.rowLineIdxs[rowIdx] > 0 {
+		t.printLine(true)
+                t.rowLineIdxs[rowIdx]--
+	}
 }
 
 // Print the rows of the table and merge the cells that are identical

table_test.go

@@ -1119,3 +1119,28 @@ func TestTitle(t *testing.T) {
 		}
 	}
 }
+
+func ExampleRowLine() {
+	table := NewWriter(os.Stdout)
+	table.SetHeader([]string{"Food", "Rating"})
+
+	table.Append([]string{"Filet Mignon", "****"})
+	table.Append([]string{"New York Steak", "***"})
+
+	table.AppendRowLine()
+
+	table.Append([]string{"Broccoli", "*"})
+	table.Append([]string{"Cauliflower", "***"})
+
+	table.Render() // Send output
+
+	// Output: +----------------+--------+
+	// |      FOOD      | RATING |
+	// +----------------+--------+
+	// | Filet Mignon   | ****   |
+	// | New York Steak | ***    |
+	// +----------------+--------+
+	// | Broccoli       | *      |
+	// | Cauliflower    | ***    |
+	// +----------------+--------+
+}