From 48311cbf1d47fa46cb345425d374642320cc5ed7 Mon Sep 17 00:00:00 2001
From: ser <ser@localhost.localdomain>
Date: Mon, 16 Dec 2019 21:36:23 +0200
Subject: [PATCH 1/3] done 1-3

---
 Exercises/1-callback.js |  8 +++++++-
 Exercises/2-closure.js  |  2 +-
 Exercises/3-wrapper.js  | 20 +++++++++++++++++++-
 3 files changed, 27 insertions(+), 3 deletions(-)

diff --git a/Exercises/1-callback.js b/Exercises/1-callback.js
index 8270a12..808648c 100644
--- a/Exercises/1-callback.js
+++ b/Exercises/1-callback.js
@@ -1,5 +1,11 @@
 'use strict';
 
-const iterate = (obj, callback) => null;
+const iterate = (obj, callback) => {
+  const keys = Object.keys(obj);
+  for (const key of keys) {
+    const value = obj[key];
+    callback(key, value, obj);
+  }
+};
 
 module.exports = { iterate };
diff --git a/Exercises/2-closure.js b/Exercises/2-closure.js
index 0f07103..7b71264 100644
--- a/Exercises/2-closure.js
+++ b/Exercises/2-closure.js
@@ -1,5 +1,5 @@
 'use strict';
 
-const store = x => null;
+const store = x => () => x;
 
 module.exports = { store };
diff --git a/Exercises/3-wrapper.js b/Exercises/3-wrapper.js
index fb7207e..3afa44c 100644
--- a/Exercises/3-wrapper.js
+++ b/Exercises/3-wrapper.js
@@ -1,5 +1,23 @@
 'use strict';
 
-const contract = (fn, ...types) => null;
+const contract = (fn, ...types) => (...args) => {
+  for (const i in args) {
+    const Type = types[i];
+    const temp = new Type();
+    const type = typeof temp.valueOf();
+    const arg = args[i];
+    if (typeof arg !== type) {
+      throw new TypeError(`Неверный тип аргумента ${arg}`);
+    }
+  }
+  const res = fn(...args);
+  const TypeRes = types[types.length - 1];
+  const tempRes = new TypeRes();
+  const typeRes = typeof tempRes.valueOf();
+  if (typeof res !== typeRes) {
+    throw new TypeError(`Неверный тип результата ${res}`);
+  }
+  return res;
+};
 
 module.exports = { contract };

From bb878c5349b1584214548ab281a917976a33549e Mon Sep 17 00:00:00 2001
From: ser <ser@localhost.localdomain>
Date: Tue, 17 Dec 2019 00:11:36 +0200
Subject: [PATCH 2/3] Using for of

---
 Exercises/3-wrapper.js      | 10 +++++-----
 Exercises/3-wrapper.js.back | 23 +++++++++++++++++++++++
 2 files changed, 28 insertions(+), 5 deletions(-)
 create mode 100644 Exercises/3-wrapper.js.back

diff --git a/Exercises/3-wrapper.js b/Exercises/3-wrapper.js
index 3afa44c..7626a25 100644
--- a/Exercises/3-wrapper.js
+++ b/Exercises/3-wrapper.js
@@ -1,13 +1,13 @@
 'use strict';
 
 const contract = (fn, ...types) => (...args) => {
-  for (const i in args) {
-    const Type = types[i];
+  let i = 0;
+  for (const val of args) {
+    const Type = types[i++];
     const temp = new Type();
     const type = typeof temp.valueOf();
-    const arg = args[i];
-    if (typeof arg !== type) {
-      throw new TypeError(`Неверный тип аргумента ${arg}`);
+    if (typeof val !== type) {
+      throw new TypeError(`Неверный тип аргумента ${val}`);
     }
   }
   const res = fn(...args);
diff --git a/Exercises/3-wrapper.js.back b/Exercises/3-wrapper.js.back
new file mode 100644
index 0000000..3afa44c
--- /dev/null
+++ b/Exercises/3-wrapper.js.back
@@ -0,0 +1,23 @@
+'use strict';
+
+const contract = (fn, ...types) => (...args) => {
+  for (const i in args) {
+    const Type = types[i];
+    const temp = new Type();
+    const type = typeof temp.valueOf();
+    const arg = args[i];
+    if (typeof arg !== type) {
+      throw new TypeError(`Неверный тип аргумента ${arg}`);
+    }
+  }
+  const res = fn(...args);
+  const TypeRes = types[types.length - 1];
+  const tempRes = new TypeRes();
+  const typeRes = typeof tempRes.valueOf();
+  if (typeof res !== typeRes) {
+    throw new TypeError(`Неверный тип результата ${res}`);
+  }
+  return res;
+};
+
+module.exports = { contract };

From 398e4170d15c4a10e483466122de9425f88022a2 Mon Sep 17 00:00:00 2001
From: ser <ser@localhost.localdomain>
Date: Tue, 17 Dec 2019 00:24:05 +0200
Subject: [PATCH 3/3] deleted a temp file

---
 Exercises/3-wrapper.js.back | 23 -----------------------
 1 file changed, 23 deletions(-)
 delete mode 100644 Exercises/3-wrapper.js.back

diff --git a/Exercises/3-wrapper.js.back b/Exercises/3-wrapper.js.back
deleted file mode 100644
index 3afa44c..0000000
--- a/Exercises/3-wrapper.js.back
+++ /dev/null
@@ -1,23 +0,0 @@
-'use strict';
-
-const contract = (fn, ...types) => (...args) => {
-  for (const i in args) {
-    const Type = types[i];
-    const temp = new Type();
-    const type = typeof temp.valueOf();
-    const arg = args[i];
-    if (typeof arg !== type) {
-      throw new TypeError(`Неверный тип аргумента ${arg}`);
-    }
-  }
-  const res = fn(...args);
-  const TypeRes = types[types.length - 1];
-  const tempRes = new TypeRes();
-  const typeRes = typeof tempRes.valueOf();
-  if (typeof res !== typeRes) {
-    throw new TypeError(`Неверный тип результата ${res}`);
-  }
-  return res;
-};
-
-module.exports = { contract };