Add 06_breadth-first_search Golang example (#81)

06_breadth-first_search/Golang/01_breadth-first_search.go

@@ -0,0 +1,50 @@
+package main
+
+func person_is_seller(name string) bool {
+	return name[len(name)-1] == 'm'
+}
+
+var graph = make(map[string][]string)
+
+func main() {
+	graph["you"] = []string{"alice", "bob", "claire"}
+	graph["bob"] = []string{"anuj", "peggy"}
+	graph["alice"] = []string{"peggy"}
+	graph["claire"] = []string{"thom", "jonny"}
+	graph["anuj"] = []string{}
+	graph["peggy"] = []string{}
+	graph["thom"] = []string{}
+	graph["jonny"] = []string{}
+
+	search("you")
+}
+
+func search(name string) bool {
+	var search_queue []string
+	search_queue = append(search_queue, graph[name]...)
+	var searched []string
+	var person string
+	for len(search_queue) != 0 {
+		person = search_queue[0]
+		search_queue = search_queue[1:]
+		if person_not_in_searched(person, searched) {
+			if person_is_seller(person) {
+				println(person + " is mango seller!")
+				return true
+			} else {
+				search_queue = append(search_queue, graph[person]...)
+				searched = append(searched, person)
+			}
+		}
+	}
+	return false
+}
+
+func person_not_in_searched(person string, searched []string) bool {
+	for _, n := range searched {
+		if n == person {
+			return false
+		}
+	}
+	return true
+}