Initial commit of modash

This was taken from github.com/lmika/gopkgs/fp

moslice/find_test.go

@@ -0,0 +1,25 @@
+package moslice_test
+
+import (
+	"lmika.dev/pkg/modash/moslice"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestContains(t *testing.T) {
+	var (
+		ints = []int{1, 2, 3}
+		strs = []string{"a", "b", "c"}
+	)
+
+	t.Run("should find items in the slice", func(t *testing.T) {
+		assert.True(t, moslice.Contains(ints, 2))
+		assert.True(t, moslice.Contains(strs, "c"))
+	})
+
+	t.Run("should return false if items not in slice", func(t *testing.T) {
+		assert.False(t, moslice.Contains(ints, 131))
+		assert.False(t, moslice.Contains(strs, "bla"))
+	})
+}