From db673f4c9871a165a2b6949e6a8203fc63b5bdd6 Mon Sep 17 00:00:00 2001
From: edipretoro <edipretoro@gmail.com>
Date: Sun, 19 Jul 2026 16:56:07 +0200
Subject: [PATCH] Adding the challenge 0101

---
 0101/kv.go      | 20 ++++++++++++++++++++
 0101/kv_test.go | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 0101/kv.go
 create mode 100644 0101/kv_test.go

diff --git a/0101/kv.go b/0101/kv.go
new file mode 100644
index 0000000..4eefa2a
--- /dev/null
+++ b/0101/kv.go
@@ -0,0 +1,20 @@
+package db0101
+
+type KV struct {
+	mem map[string][]byte
+}
+
+func (kv *KV) Open() error {
+	kv.mem = map[string][]byte{} // empty
+	return nil
+}
+
+func (kv *KV) Close() error { return nil }
+
+func (kv *KV) Get(key []byte) (val []byte, ok bool, err error)
+
+func (kv *KV) Set(key []byte, val []byte) (updated bool, err error)
+
+func (kv *KV) Del(key []byte) (deleted bool, err error)
+
+// QzBQWVJJOUhU https://trialofcode.org/
diff --git a/0101/kv_test.go b/0101/kv_test.go
new file mode 100644
index 0000000..74ccadf
--- /dev/null
+++ b/0101/kv_test.go
@@ -0,0 +1,34 @@
+package db0101
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestKVBasic(t *testing.T) {
+	kv := KV{}
+	err := kv.Open()
+	assert.Nil(t, err)
+	defer kv.Close()
+
+	updated, err := kv.Set([]byte("k1"), []byte("v1"))
+	assert.True(t, updated && err == nil)
+
+	val, ok, err := kv.Get([]byte("k1"))
+	assert.True(t, string(val) == "v1" && ok && err == nil)
+
+	_, ok, err = kv.Get([]byte("xxx"))
+	assert.True(t, !ok && err == nil)
+
+	updated, err = kv.Del([]byte("xxx"))
+	assert.True(t, !updated && err == nil)
+
+	updated, err = kv.Del([]byte("k1"))
+	assert.True(t, updated && err == nil)
+
+	_, ok, err = kv.Get([]byte("xxx"))
+	assert.True(t, !ok && err == nil)
+}
+
+// QzBQWVJJOUhU https://trialofcode.org/