From d1fb70ef5123cdc668dacc681c84ef7645637c03 Mon Sep 17 00:00:00 2001
From: Daniil Denisyuk <ordekonec@gmail.com>
Date: Mon, 16 Dec 2019 16:05:20 +0200
Subject: [PATCH 1/2] work

---
 Exercises/1-callback.js | 13 ++++++++++++-
 Exercises/2-closure.js  |  2 +-
 Exercises/3-wrapper.js  | 14 +++++++++++++-
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/Exercises/1-callback.js b/Exercises/1-callback.js
index 8270a12..970249d 100644
--- a/Exercises/1-callback.js
+++ b/Exercises/1-callback.js
@@ -1,5 +1,16 @@
 'use strict';
 
-const iterate = (obj, callback) => null;
+const iterate = (object, callback) => {
+  for (let key in object){
+    if(object.hasOwnProperty(key))
+      callback(key, object[key]);
+  }
+//  for (let [key, value] of Object.entries(object) ) {
+//    callback(key, value);
+//  }
+//  Object.entries(object).forEach(([key, value])=>{
+//    callback(key, value);
+//})
+}
 
 module.exports = { iterate };
diff --git a/Exercises/2-closure.js b/Exercises/2-closure.js
index 0f07103..d44f4a5 100644
--- a/Exercises/2-closure.js
+++ b/Exercises/2-closure.js
@@ -1,5 +1,5 @@
 'use strict';
 
-const store = x => null;
+const store = value => () => value;
 
 module.exports = { store };
diff --git a/Exercises/3-wrapper.js b/Exercises/3-wrapper.js
index fb7207e..ab9a02a 100644
--- a/Exercises/3-wrapper.js
+++ b/Exercises/3-wrapper.js
@@ -1,5 +1,17 @@
 'use strict';
 
-const contract = (fn, ...types) => null;
+const contract = (fn, ...types) => (...args) => {
+  for(let index in args){
+    const arg = args[index];
+    if(arg !== types[index](arg)) throw new TypeError(`type of argument '${value}': '${typeof value}' does not match '${types[index]}'!`);
+  }
+//args.forEach((value, index) => {
+//    if(value !== types[index](value)) throw new TypeError(`type of argument '${value}': '${typeof value}' does not match '${types[index]}'!`);
+//  })
+  const res = fn(...args);
+  if(res !== types[types.length - 1](res))
+    throw new TypeError(`type of result '${res}': '${typeof res}' does not match '${types[types.length-1]}'!`);
+  return res;
+}
 
 module.exports = { contract };

From 6f20907de247b9c86ed055bd369a95f824a2ee64 Mon Sep 17 00:00:00 2001
From: Daniil Denisyuk <ordekonec@gmail.com>
Date: Mon, 16 Dec 2019 22:52:15 +0200
Subject: [PATCH 2/2] fixed

---
 Exercises/1-callback.js | 14 ++++----------
 Exercises/2-closure.js  |  2 +-
 Exercises/3-wrapper.js  | 18 ++++++++++--------
 3 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/Exercises/1-callback.js b/Exercises/1-callback.js
index 970249d..2108487 100644
--- a/Exercises/1-callback.js
+++ b/Exercises/1-callback.js
@@ -1,16 +1,10 @@
 'use strict';
 
 const iterate = (object, callback) => {
-  for (let key in object){
-    if(object.hasOwnProperty(key))
-      callback(key, object[key]);
+  for (const key in object) {
+    if (Object.prototype.hasOwnProperty.call(object, key))
+      callback(key, object[key], object);
   }
-//  for (let [key, value] of Object.entries(object) ) {
-//    callback(key, value);
-//  }
-//  Object.entries(object).forEach(([key, value])=>{
-//    callback(key, value);
-//})
-}
+};
 
 module.exports = { iterate };
diff --git a/Exercises/2-closure.js b/Exercises/2-closure.js
index d44f4a5..7b71264 100644
--- a/Exercises/2-closure.js
+++ b/Exercises/2-closure.js
@@ -1,5 +1,5 @@
 'use strict';
 
-const store = value => () => value;
+const store = x => () => x;
 
 module.exports = { store };
diff --git a/Exercises/3-wrapper.js b/Exercises/3-wrapper.js
index ab9a02a..62b14a3 100644
--- a/Exercises/3-wrapper.js
+++ b/Exercises/3-wrapper.js
@@ -1,17 +1,19 @@
 'use strict';
 
 const contract = (fn, ...types) => (...args) => {
-  for(let index in args){
+  for (const index in args) {
     const arg = args[index];
-    if(arg !== types[index](arg)) throw new TypeError(`type of argument '${value}': '${typeof value}' does not match '${types[index]}'!`);
+    if (arg !== types[index](arg)) throw new TypeError(
+      `type of argument '${arg}': '${typeof arg}'
+      does not match '${types[index]}'!`);
   }
-//args.forEach((value, index) => {
-//    if(value !== types[index](value)) throw new TypeError(`type of argument '${value}': '${typeof value}' does not match '${types[index]}'!`);
-//  })
   const res = fn(...args);
-  if(res !== types[types.length - 1](res))
-    throw new TypeError(`type of result '${res}': '${typeof res}' does not match '${types[types.length-1]}'!`);
+  if (res !== types[types.length - 1](res))
+    throw new TypeError(
+      `type of result '${res}': '${typeof res}'
+       does not match '${types[types.length - 1]}'!`
+    );
   return res;
-}
+};
 
 module.exports = { contract };