Lab2 Reusable

.eslintrc.json

@@ -18,7 +18,7 @@
     ],
     "linebreak-style": [
       "error",
-      "unix"
+      "windows"
     ],
     "quotes": [
       "error",

Exercises/1-let.js

@@ -1,5 +1,5 @@
 'use strict';
 
-let name = undefined;
+let name = 'Vladimir';
 
 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 +1,12 @@
 'use strict';
 
-const range = null;
+const range = (start, end) => {
+  const array = [];
+  if (array.length < 0) return [];
+  for (let i = start; i <= end; i++) {
+    array.push(i);
+  }
+  return array;
+};
 
 module.exports = { range };

Exercises/5-range-odd.js

@@ -1,5 +1,13 @@
 'use strict';
 
-const rangeOdd = null;
+const rangeOdd = (start, end) => {
+  const array = [];
+  if (array.length < 0) return [];
+  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 +1,18 @@
 'use strict';
 
-const square = null;
+const square = (a) => a * a;
 
-const cube = null;
+const cube = (a) => a ** 3;
 
-const average = null;
+const average = (a, b) => (a + b) / 2;
 
-const calculate = null;
+const calculate = () => {
+  const array = [];
+  for (let i = 0; i <= 9; i++) {
+    const ave = average(square(i), cube(i));
+    array.push(ave);
+  }
+  return array;
+};
 
 module.exports = { square, cube, average, calculate };

Exercises/7-objects.js

@@ -1,5 +1,15 @@
 'use strict';
 
-const fn = null;
+const fn = () => {
+  let objectLet = { name: 'Vladimir' };
+  const objectConst = { name: 'Vladimir' };
+  objectLet.name = 'Sergey';
+  objectConst.name = 'Sergey';
+  const object = { name: 'Timur' };
+  objectLet = object;
+  //objectConst = object; - TypeError: Assignment to constant variable
+};
+
+fn();
 
 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 +1,16 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = [
+  { name: 'John', phone: '+380669876420' },
+  { name: 'Vladimir', phone: '+380959546176' },
+  { name: 'Sergey', phone: '+380997865430' }
+];
 
-const findPhoneByName = null;
+const findPhoneByName = (name) => {
+  for (const k of phonebook) {
+    if (k.name === name)
+      return k.phone;
+  }
+};
 
 module.exports = { phonebook, findPhoneByName };

Exercises/a-hash.js

@@ -1,7 +1,11 @@
 'use strict';
 
-const phonebook = null;
+const phonebook = {
+  John: '+380669876420',
+  Vladimir: '+380959546176',
+  Sergey: '+380997865430'
+};
 
-const findPhoneByName = null;
+const findPhoneByName = (name) => phonebook[name];
 
 module.exports = { phonebook, findPhoneByName };

package.json

@@ -5,7 +5,7 @@
   "author": "Timur Shemsedinov <[email protected]>",
   "license": "MIT",
   "scripts": {
-    "test": "eslint ./Exercises; hpw",
+    "test": "eslint ./Exercises && hpw",
     "ci": "eslint ./Exercises && hpw"
   },
   "dependencies": {