adding lop.Map and lop.ForEach

parallel/slice_test.go

@@ -0,0 +1,24 @@
+package parallel
+
+import (
+	"testing"
+	"strconv"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestMap(t *testing.T) {
+	is := assert.New(t)
+
+	result1 := Map[int, string]([]int{1, 2, 3, 4}, func(x int, _ int) string {
+		return "Hello"
+	})
+	result2 := Map[int64, string]([]int64{1, 2, 3, 4}, func(x int64, _ int) string {
+		return strconv.FormatInt(x, 10)
+	})
+
+	is.Equal(len(result1), 4)
+	is.Equal(len(result2), 4)
+	is.Equal(result1, []string{"Hello", "Hello", "Hello", "Hello"})
+	is.Equal(result2, []string{"1", "2", "3", "4"})
+}