准备回滚到数组版本

hashmap/gomap/hashmap.go

@@ -0,0 +1,63 @@
+package gomap
+
+import "fmt"
+
+type HashMap struct {
+	hm map[interface{}]interface{}
+}
+
+// New instantiates a hash map.
+func New() *HashMap {
+	return &HashMap{hm: make(map[interface{}]interface{})}
+}
+
+// Put inserts element into the map.
+func (hm *HashMap) Put(key interface{}, value interface{}) {
+	hm.hm[key] = value
+}
+
+func (hm *HashMap) Get(key interface{}) (value interface{}, isfound bool) {
+	value, isfound = hm.hm[key]
+	return
+}
+
+func (hm *HashMap) Remove(key interface{}) {
+	delete(hm.hm, key)
+}
+
+func (hm *HashMap) Empty() bool {
+	return len(hm.hm) == 0
+}
+
+func (hm *HashMap) Size() int {
+	return len(hm.hm)
+}
+
+func (hm *HashMap) Keys() []interface{} {
+	keys := make([]interface{}, len(hm.hm))
+	count := 0
+	for key := range hm.hm {
+		keys[count] = key
+		count++
+	}
+	return keys
+}
+
+func (hm *HashMap) Values() []interface{} {
+	values := make([]interface{}, len(hm.hm))
+	count := 0
+	for _, value := range hm.hm {
+		values[count] = value
+		count++
+	}
+	return values
+}
+
+func (hm *HashMap) Clear() {
+	hm.hm = make(map[interface{}]interface{})
+}
+
+func (hm *HashMap) String() string {
+	str := fmt.Sprintf("%v", hm.hm)
+	return str
+}