add map

Author: hsldymq

map.go

@@ -0,0 +1,36 @@
+package handy
+
+func NewMap[TK comparable, TV any]() *Map[TK, TV] {
+    return &Map[TK, TV]{
+        m: make(map[TK]TV),
+    }
+}
+
+type Map[TK comparable, TV any] struct {
+    m map[TK]TV
+}
+
+func (m *Map[TK, TV]) HasKey(key TK) bool {
+    _, ok := m.m[key]
+    return ok
+}
+
+func (m *Map[TK, TV]) Set(key TK, value TV) {
+    m.m[key] = value
+}
+
+func (m *Map[TK, TV]) SetOnce(key TK, value TV) bool {
+    if _, ok := m.m[key]; !ok {
+        m.m[key] = value
+        return true
+    }
+    return false
+}
+
+func (m *Map[TK, TV]) Merge(maps ...*Map[TK, TV]) {
+    for _, each := range maps {
+        for k, v := range each.m {
+            m.m[k] = v
+        }
+    }
+}