diff --git a/.eslintrc.json b/.eslintrc.json
index 188baf7..9b0f412 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -18,7 +18,7 @@
],
"linebreak-style": [
"error",
- "unix"
+ "windows"
],
"quotes": [
"error",
@@ -265,4 +265,4 @@
"never"
]
}
-}
+}
\ No newline at end of file
diff --git a/Exercises/1-callback.js b/Exercises/1-callback.js
index 8270a12..ccde3b3 100644
--- a/Exercises/1-callback.js
+++ b/Exercises/1-callback.js
@@ -1,5 +1,10 @@
'use strict';
-const iterate = (obj, callback) => null;
+const iterate = (object, callback) => {
+ for (const key in object) {
+ const value = object[key];
+ callback(key, value, object);
+ }
+};
module.exports = { iterate };
diff --git a/Exercises/2-closure.js b/Exercises/2-closure.js
index 0f07103..8cbbe9c 100644
--- a/Exercises/2-closure.js
+++ b/Exercises/2-closure.js
@@ -1,5 +1,6 @@
'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..8f8f4f5 100644
--- a/Exercises/3-wrapper.js
+++ b/Exercises/3-wrapper.js
@@ -1,5 +1,28 @@
'use strict';
-const contract = (fn, ...types) => null;
+const contract = (fn, ...types) => (...args) => {
+ for (let i = 0; i < args.length; i++) {
+ const type = types[i].name;
+ const argType = typeof args[i];
+ if (type.toLowerCase() !== argType) {
+ throw new TypeError(
+ `Expected argument type "${type}"`
+ );
+ }
+ }
+
+ const res = fn(...args);
+ const resType = typeof res;
+ const lastType = types[types.length - 1].name;
+
+ if (resType !== lastType.toLowerCase()) {
+ throw new TypeError(
+ `Expected result type "${lastType}"`
+ );
+ }
+
+ return res;
+};
+
module.exports = { contract };
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