all in 1

Exercises/1-let.js

@@ -1,5 +1,5 @@
 'use strict';
 
-let name = undefined;
+let name = 'Illia';
 
 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 +1,6 @@
 'use strict';
 
-const hello = null;
-
+const hello = (name) => {
+  console.log(name);
+};
 module.exports = { hello };

Exercises/4-range.js

@@ -1,5 +1,14 @@
 'use strict';
+const range = (start, end) => {
+  const len = end - start;
+  if (len < 0) return [];
+  const arrey = [];
+  let a = 0;
+  for (let i = start; i <= end; i++, a++)
+    arrey[a] = i;
+  return arrey;
 
-const range = null;
+
+};
 
 module.exports = { range };

Exercises/5-range-odd.js

@@ -1,5 +1,14 @@
 'use strict';
+const rangeOdd = (start, end) => {
+  const len = end - start;
+  if (len < 0) return [];
+  const arrey = [];
+  let a = 0;
+  for (let i = start; i <= end; i++) {
+    if (i % 2 === 0) continue;
 
-const rangeOdd = null;
-
+    arrey[a++] = i;
+  }
+  return arrey;
+};
 module.exports = { rangeOdd };

Exercises/6-calculate.js

@@ -1,11 +1,18 @@
 '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 = () => {
+  const mas = [];
+  for (let i = 0; i <= 9; i++) {
+    mas[i] = average(square(i), cube(i));
+  }
+  return mas;
+};
 
-const calculate = null;
 
 module.exports = { square, cube, average, calculate };

Exercises/7-objects.js

@@ -1,5 +1,13 @@
 'use strict';
 
-const fn = null;
+const fn = () => {
+
+  const obiekt1 = { name: 'AAA', };
+  let obiekt2 = { name: 'BBB', };
+
+  obiekt1.name = 'TTT';
+  obiekt2.name = 'CCC';
+  obiekt2 = { name: 'LLL', age: 10 };
+};
 
 module.exports = { fn };

Exercises/8-create.js

@@ -1,5 +1,9 @@
 'use strict';
 
-const createUser = null;
+const createUser = (name, city) => {
+  const Person = { name, city };
+  return Person;
+};
+
 
 module.exports = { createUser };

Exercises/9-array.js

@@ -1,7 +1,16 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = [
+  { name: 'M', phone: '123' },
+  { name: 'A', phone: '456' },
+];
+
+const findPhoneByName = (name) => {
+  for (const r of phonebook) {
+    if (r.name === name)
+      return r.phone;
+  }
+};
 
-const findPhoneByName = null;
 
 module.exports = { phonebook, findPhoneByName };

Exercises/a-hash.js

@@ -1,7 +1,10 @@
 'use strict';
 
-const phonebook = null;
-
-const findPhoneByName = null;
+const phonebook = {
+  M: 123,
+  A: 456,
+};
 
+const findPhoneByName = (name) => phonebook[name];
+console.log(findPhoneByName('A'));
 module.exports = { phonebook, findPhoneByName };

JavaScript/1-identifiers.js

@@ -1,6 +1,6 @@
 'use strict';
 
-const INTERVAL = 500;
+const INTERVAL = 500000;
 let counter = 0;
 const MAX_VALUE = 10;
 let timer = null;
@@ -16,4 +16,4 @@ const event = () => {
 };
 
 console.log('Begin');
-timer = setInterval(event, INTERVAL);
+timer = setInterval(event, 500);

Solutions/4-range.js

@@ -11,4 +11,5 @@ const range = (begin, end) => {
   return array;
 };
 
-module.exports = { range };
+console.log(range(10, 100));
+//module.exports = { range };