Convert AddConvert to store funcs in map

README.md

@@ -34,11 +34,14 @@ Or
 or
 
 ```Go
-html2md.AddConvert(func(content string) string {
+html2md.AddConvert(60, func(content string) string {
     return strings.ToLower(content)
 })
 ```
 
+Converts are executed in order. The builtin converts are 10-50. Choose
+your own value to override the builtins or run yours before/after.
+
 # Docs
 
 * [GoDoc](http://godoc.org/github.com/lunny/html2md)

core.go

@@ -21,13 +21,13 @@ func AttrRegExp(attr string) *regexp.Regexp {
 
 var (
 	rules    = make(map[string]*Rule)
-	converts = make([]func(string) string, 0)
+	converts = make(map[int]func(string) string)
 )
 
 func AddRule(name string, rule *Rule) {
 	rules[name] = rule
 }
 
-func AddConvert(f func(string) string) {
-	converts = append(converts, f)
+func AddConvert(order int, f func(string) string) {
+	converts[order] = f
 }

html2md.go

@@ -320,7 +320,7 @@ func wrapInlineTag(content, openWrap, closeWrap string) string {
 }
 
 func WrapInlineTag(content, openWrap, closeWrap string) string {
-  return wrapInlineTag(content, openWrap, closeWrap)
+	return wrapInlineTag(content, openWrap, closeWrap)
 }
 
 func init() {
@@ -334,11 +334,11 @@ func init() {
 	AddRule("code", Code())
 	AddRule("a", A())
 
-	AddConvert(pre)
-	AddConvert(ul)
-	AddConvert(ol)
-	AddConvert(blockQuote)
-	AddConvert(cleanUp)
+	AddConvert(10, pre)
+	AddConvert(20, ul)
+	AddConvert(30, ol)
+	AddConvert(40, blockQuote)
+	AddConvert(50, cleanUp)
 }
 
 func Convert(content string) string {
@@ -348,8 +348,15 @@ func Convert(content string) string {
 		}
 	}
 
-	for _, convert := range converts {
-		content = convert(content)
+	// Source: https://stackoverflow.com/a/18342865/504018
+	keys := make([]int, 0)
+	for k, _ := range converts {
+		keys = append(keys, k)
+	}
+	sort.Ints(keys)
+
+	for order := range keys {
+		content = convert[order](content)
 	}
 
 	return content