diff --git a/src/entrypoints/map.ts b/src/entrypoints/map.ts
new file mode 100644
index 0000000..7936775
--- /dev/null
+++ b/src/entrypoints/map.ts
@@ -0,0 +1,16 @@
+type Mapper<T, R> =  (item: T, index: number, arrayLength: number) => R | Promise<R>;
+
+export const map = async <U, Q>(data: Array<Q>, mapper: Mapper<Q, U>): Promise<U[]> => {
+    const result: U[] = []
+    let index = 0
+    for (const item of data) {
+        result.push(await mapper(item, index, data.length))
+        index++
+    }
+    return result
+}
+
+const double = (num: number) => num * 2
+const data = [1, 2, 3, 4, 5]
+
+map(data, double)
\ No newline at end of file
diff --git a/src/index.ts b/src/index.ts
index 0786657..432a1f3 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,2 +1,3 @@
 export * from './entrypoints/retry'
-export * from './entrypoints/sleep'
\ No newline at end of file
+export * from './entrypoints/sleep'
+export * from './entrypoints/map'