add xmap.Values (#19)

generic/xmap/values.go

@@ -0,0 +1,13 @@
+package xmap
+
+// Values returns a new slice with all values from the given input map.
+// Note: Returned values slice is not sorted.
+func Values[M ~map[K]V, K comparable, V any](input M) []V {
+	output := make([]V, 0, len(input))
+
+	for _, v := range input {
+		output = append(output, v)
+	}
+
+	return output
+}

generic/xmap/values_test.go

@@ -0,0 +1,42 @@
+package xmap
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIntValues(t *testing.T) {
+	vals := Values(map[string]int{
+		"1": 1,
+		"2": 2,
+		"3": 3,
+		"4": 4,
+		"5": 5,
+		"6": 6,
+	})
+
+	sort.Ints(vals)
+	assert.EqualValues(t, []int{1, 2, 3, 4, 5, 6}, vals)
+}
+
+func TestStructValues(t *testing.T) {
+	type testStruct struct {
+		ID    int
+		Valid bool
+	}
+
+	vals := Values(map[string]testStruct{
+		"1": {ID: 1, Valid: true},
+		"2": {ID: 2},
+		"3": {ID: 3, Valid: true},
+		"4": {ID: 4},
+	})
+
+	sort.Slice(vals, func(i, j int) bool {
+		return vals[i].ID < vals[j].ID
+	})
+
+	assert.EqualValues(t, []testStruct{{ID: 1, Valid: true}, {ID: 2}, {ID: 3, Valid: true}, {ID: 4}}, vals)
+}