lab2

Exercises/1-let.js

@@ -1,5 +1,6 @@
 'use strict';
 
-let name = undefined;
+let name = 'Yarik';
+
 
 module.exports = { name };

Exercises/2-const.js

@@ -1,5 +1,5 @@
 'use strict';
 
-const year = undefined;
+const year = 2004;
 
 module.exports = { year };

Exercises/3-hello.js

@@ -1,5 +1,7 @@
 'use strict';
 
-const hello = null;
+const hello = (name) => {
+  console.log(`Hello, ${name}`);
+};
 
 module.exports = { hello };

Exercises/4-range.js

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

Exercises/5-range-odd.js

@@ -1,5 +1,11 @@
 'use strict';
 
-const rangeOdd = null;
+const rangeOdd = (start, end) => {
+  const array = [];
+  for (let i = start; i <= end; ++i) {
+    if (i % 2 !== 0) array.push(i);
+  }
+  return array;
+};
 
 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 results = [];
+  for (let i = 0; i <= 9; i++) {
+    results.push(average(square(i), cube(i)));
+  }
+  return results;
+};
 
 module.exports = { square, cube, average, calculate };

Exercises/7-objects.js

@@ -1,5 +1,12 @@
 'use strict';
 
-const fn = null;
+const fn = () => {
+  const object1 = { name: 'Yarik' };
+  let object2 = { name: 'Bodya' };
+  object1.name = 'Bodya';
+  object2.name = 'Yarik';
+  //object1 = { name: 'Vanya' };
+  object2 = { name: 'Andriy' };
+};
 
 module.exports = { fn };

Exercises/8-create.js

@@ -1,5 +1,7 @@
 'use strict';
 
-const createUser = null;
-
+const createUser = (name, city) => {
+  const newUser = { name, city };
+  return newUser;
+};
 module.exports = { createUser };

Exercises/9-array.js

@@ -1,7 +1,15 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = [
+  { name: 'Vanya', phone: '+380447859437' },
+  { name: 'Kostya', phone: '+380445033776' },
+  { name: 'Andriy', phone: '+380447483374' }
+];
 
-const findPhoneByName = null;
+const findPhoneByName = (name) => {
+  for (const acc of phonebook) {
+    if (acc.name === name) return acc.phone;
+  }
+};
 
 module.exports = { phonebook, findPhoneByName };

Exercises/a-hash.js

@@ -1,7 +1,11 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = {
+  'Vanya': '+380447859437',
+  'Kostya': '+380445033776',
+  'Andriy': '+380447483374',
+};
 
-const findPhoneByName = null;
+const findPhoneByName = (name) => phonebook[name];
 
 module.exports = { phonebook, findPhoneByName };