tree finally works on all 3 test files

main.go

@@ -131,6 +131,5 @@ func main() {
 		}
 	}
 
-	my_children := get_child_indices(0, headings)
-	fmt.Printf("%v\n", my_children)
+	tree(-1, "", headings)
 }

tree.go

@@ -1,5 +1,9 @@
 package main
 
+import (
+	"fmt"
+)
+
 func get_children(header_index int, headings []heading) []heading {
 	var children []heading
 
@@ -47,17 +51,21 @@ func get_root_children(headings []heading) []int {
 	return root_children
 }
 
-// TODO: -1 for root -> get indices for headers lying directly under root
 func get_child_indices(header_index int, headings []heading) []int {
 	var children []int
 
-	parent_level := get_heading_level(headings[header_index].text)
+	if header_index == -1 {
+		children = get_root_children(headings)
+		return children
+	}
+
+	parent_level := headings[header_index].level
 
 	if header_index >= (len(headings) - 1) {
 		return nil
 	}
 
-	next_level := get_heading_level(headings[header_index+1].text)
+	next_level := headings[header_index+1].level
 
 	child_level := 0
 
@@ -69,7 +77,7 @@ func get_child_indices(header_index int, headings []heading) []int {
 	cur_level := 0
 
 	for i := (header_index + 1); i < len(headings); i++ {
-		cur_level = get_heading_level(headings[i].text)
+		cur_level = headings[i].level
 
 		if cur_level == child_level {
 			children = append(children, i)
@@ -82,3 +90,19 @@ func get_child_indices(header_index int, headings []heading) []int {
 
 	return children
 }
+
+func tree(index int, prefix string, headings []heading) {
+	children := get_child_indices(index, headings)
+	//fmt.Printf("children: %v\n", children)
+
+	for index, child_index := range children {
+		//fmt.Printf("child_index: %d\n", child_index)
+		if index == (len(children) - 1) {
+			fmt.Println(prefix+"`--", headings[child_index].text)
+			tree(child_index, prefix+"    ", headings)
+		} else {
+			fmt.Println(prefix+"|--", headings[child_index].text)
+			tree(child_index, prefix+"|   ", headings)
+		}
+	}
+}