Quest completed

Exercises/1-let.js

@@ -1,5 +1,5 @@
 'use strict';
 
-let name = undefined;
+let name = 'andvs';
 
 module.exports = { name };

Exercises/2-const.js

@@ -1,5 +1,5 @@
 'use strict';
 
-const year = undefined;
+const year = 1991;
 
 module.exports = { year };

Exercises/3-hello.js

@@ -1,5 +1,5 @@
 'use strict';
 
-const hello = null;
+const hello = (name) => { console.log(name); };
 
 module.exports = { hello };

Exercises/4-range.js

@@ -1,5 +1,11 @@
 'use strict';
 
-const range = null;
+const range = (start, end) => {
+  const arr = [];
+  for (let i = start; i <= end; i++) {
+    arr.push(i);
+  }
+  return arr;
+};
 
 module.exports = { range };

Exercises/5-range-odd.js

@@ -1,5 +1,11 @@
 'use strict';
 
-const rangeOdd = null;
+const rangeOdd = (start, end) => {
+  const arr = [];
+  for (let i = start; i <= end; i++) {
+    if (i % 2 !== 0) arr.push(i);
+  }
+  return arr;
+};
 
 module.exports = { rangeOdd };

Exercises/6-calculate.js

@@ -1,11 +1,17 @@
 'use strict';
 
-const square = null;
+const square = (x) => x * x;
 
-const cube = null;
+const cube = (x) => x ** 3;
 
-const average = null;
+const average = (a, b) => (a + b) / 2;
 
-const calculate = null;
+const calculate = () => {
+  const arr = [];
+  for (let index = 0; index <= 9; index++) {
+    arr.push(average(square(index), cube(index)));
+  }
+  return arr;
+};
 
 module.exports = { square, cube, average, calculate };

Exercises/7-objects.js

@@ -1,5 +1,15 @@
 'use strict';
 
-const fn = null;
+const fn = () => {
+  let obj = { name: '' };
+  const obj1 = { name: '' };
+  obj1.name = 'Andrei';
+  console.dir(obj1);
+  obj = obj1;
+  console.dir(obj);
+  obj.name = 'Marcus';
+  console.dir(obj1);
+  console.dir(obj);
+};
 
 module.exports = { fn };

Exercises/8-create.js

@@ -1,5 +1,5 @@
 'use strict';
 
-const createUser = null;
+const createUser = (name, city) => ({ name, city });
 
 module.exports = { createUser };

Exercises/9-array.js

@@ -1,7 +1,14 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = [
+  { name: 'Marcus Aurelius', phone: '+380445554433' },
+  { name: 'Andrei Shneyer', phone: '+380979707970' }
+];
 
-const findPhoneByName = null;
+const findPhoneByName = (name) => {
+  for (const obj of phonebook) {
+    if (obj.name === name) return obj.phone;
+  }
+};
 
 module.exports = { phonebook, findPhoneByName };

Exercises/a-hash.js

@@ -1,7 +1,11 @@
 'use strict';
 
-const phonebook = null;
+const phonebook =
+  {
+    'Marcus Aurelius': '+380445554433',
+    'Andrei Shneyer': '+380979707970'
+  };
 
-const findPhoneByName = null;
+const findPhoneByName = (name) => phonebook[name];
 
 module.exports = { phonebook, findPhoneByName };