Implementation of breadth first search in Golang (#83)

* Implementation of breadth first search in Golang

* fixed package name in go lang implementation of breadth first search

* fixed package name in go lang implementation of breadth first search

06_breadth-first_search/golang/bfs.go

@@ -0,0 +1,55 @@
+package main
+
+import (
+	"fmt"
+)
+
+func PersonIsSeller(name string) bool {
+	/* Assuming the person whose name ends with m as the mango seller as per the book */
+	return string(name[len(name)-1]) == "m"
+}
+
+func search(name string) bool {
+	graph := make(map[string][]string)
+	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 queue
+	var search_queue []string
+	search_queue = append(search_queue, graph[name]...)
+	var searched []string
+	for len(search_queue) > 0 {
+		var person = search_queue[0]
+		search_queue = search_queue[1:]
+		var person_already_searched = false
+		/* Checking to see if this person has already been searched */
+		for i := 0; i < len(searched); i++ {
+			if searched[i] == person {
+				person_already_searched = true
+
+			}
+		}
+		if person_already_searched == false {
+			if PersonIsSeller(person) {
+				fmt.Println(person + " is the mango seller!")
+				return true
+			} else {
+				search_queue = append(search_queue, graph[person]...)
+				searched = append(searched, person)
+			}
+		}
+
+	}
+	return false
+
+}
+
+func main() {
+	search("you")
+}