diff --git a/src/cmd/test/main.go b/src/cmd/test/main.go
index aa46234..dee5d0e 100644
--- a/src/cmd/test/main.go
+++ b/src/cmd/test/main.go
@@ -5,6 +5,7 @@ import (
 	//"github.com/mojosa-software/godat/src/slicex"
 	//"github.com/mojosa-software/godat/src/poolx"
 	"github.com/mojosa-software/godat/src/rangex"
+	"github.com/mojosa-software/godat/src/mapx"
 	"fmt"
 )
 
@@ -13,13 +14,38 @@ type Struct struct {
 	Value int
 }
 
+type MyMap struct {
+	mapx.Map[string, int]
+}
+
+func NewMyMap() *MyMap {
+	return &MyMap{
+		Map: mapx.New[string, int](),
+	}
+}
+
 func main() {
-	rangex.New[float32](0, .001, 1).Chan().ForEach(
+	rangex.New[float32](0, .001, 0.050).Chan().ForEach(
 		func(i int, v float32) bool {
 			fmt.Println(i, v)
 			return true
 		},
 	)
+	
+	m := mapx.New[string, int]()
+	m.Set("suck", 1)
+	m.Set("cock", 10)
+	
+	for k, v := range m {
+		fmt.Println(k, v)
+	}	
+	
+	fmt.Println(m.Has("dick"))
+	
+	mm := NewMyMap()
+	mm.Set("dicker", 15)
+	
+	fmt.Println(mm.Get("dicker"))
 	/*m := map[string] string {
 		"Key1" : "Value1",
 		"Key2" : "Value2",
diff --git a/src/mapx/main.go b/src/mapx/main.go
index 1a9f607..2d0f285 100644
--- a/src/mapx/main.go
+++ b/src/mapx/main.go
@@ -1,9 +1,22 @@
 package mapx
 
+import (
+	"fmt"
+)
+
 // The package implements some more specific
 // map structures for special uses.
 
-func Keys[K comparable, V any](m map[K] V) []K {
+// General map type, wrap for the built-in one.
+type Map[K comparable, V any] map[K] V
+
+// Returns new basic map.
+func New[K comparable, V any]() Map[K, V] {
+	return make(Map[K, V])
+}
+
+// Returns slice of keys of the map.
+func (m Map[K, V]) Keys() []K {
 	r := make([]K, 0, len(m))
 	for k := range m {
 		r = append(r, k)
@@ -12,7 +25,8 @@ func Keys[K comparable, V any](m map[K] V) []K {
 	return r
 }
 
-func Values[K comparable, V any](m map[K] V) []V {
+// Returns slice of values of the map.
+func (m Map[K, V]) Values(sm map[K] V) []V {
 	r := make([]V, 0, len(m))
 	for _, v := range m {
 		r = append(r, v)
@@ -21,12 +35,23 @@ func Values[K comparable, V any](m map[K] V) []V {
 	return r
 }
 
-func Reverse[K, V comparable](m map[K] V) map[V] K {
-	r := make(map[V] K)
-	for k, v := range m {
-		r[v] = k
-	}
-
-	return r
+// Checks if the map contains the key.
+func (m Map[K, V]) Has(k K) bool {
+	_, ok := m[k]
+	return ok
+}
+
+// Sets the new value by key or resets if it exists.
+func (m Map[K, V]) Set(k K, v V) {
+	m[k] = v
+}
+
+// Returns the value by key. Panics if there is no such key.
+func (m Map[K, V]) Get(k K) V {
+	v, ok := m[k]
+	if !ok {
+		panic(fmt.Sprintf("there is no such key '%v'", k))
+	}
+	return v
 }
 
diff --git a/src/mapx/ordered.go b/src/mapx/ordered.go
index 86e9e8e..7d0a3f0 100644
--- a/src/mapx/ordered.go
+++ b/src/mapx/ordered.go
@@ -1,5 +1,9 @@
 package mapx
 
+import (
+	"github.com/mojosa-software/godat/src/iterx"
+)
+
 // The type makes the underlying map ordered,
 // so every time you pass through all the values
 // they will be in the same order.
@@ -19,18 +23,41 @@ func NewOrdered[K comparable, V any]() *OrderedMap[K, V] {
 func (m *OrderedMap[K, V]) Set(k K, v V) {
 	_, ok := m.store[k]
 	if !ok {
-		keys = append(keys, k)
+		m.keys = append(m.keys, k)
 	}
 	
 	m.store[k] = v
 }
 
+func (m *OrderedMap[K, V]) Has(k K) bool {
+	_, ok := m.store[k]
+	return ok
+}
+
 // Get the value from the map.
-func (m *OrderedMap[K, V]) Get(k K) (V, bool) {
-	v, ok := m.store[k]
-	return v, ok
+func (m *OrderedMap[K, V]) Get(k K) (V) {
+	v := m.store[k]
+	return v
+}
+
+// 
+func (m *OrderedMap[K, V]) Keys() []K {
+	return m.keys
 }
 
 // Return channel of pairs.
-func (m *OrderedMap[K, V]) Range() chan Pair
+func (m *OrderedMap[K, V]) Chan() iterx.PairChan[K, V] {
+	chn := make(iterx.PairChan[K, V])
+	go func(){
+		for _, k := range m.keys {
+			chn <- iterx.Pair[K, V]{
+				K: k,
+				V: m.Get(k),
+			}
+		}
+		close(chn)
+	}()
+	
+	return chn
+}