feat: add ForEach func

maputil/map_test.go

@@ -62,3 +62,22 @@ func TestMerge(t *testing.T) {
 
 	assert.Equal(expected, acturl)
 }
+
+func TestForEach(t *testing.T) {
+	assert := internal.NewAssert(t, "TestForEach")
+
+	m := map[string]int{
+		"a": 1,
+		"b": 2,
+		"c": 3,
+		"d": 4,
+	}
+
+	var sum int
+
+	ForEach(m, func(_ string, value int) {
+		sum += value
+	})
+
+	assert.Equal(10, sum)
+}