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Author: Larilok

Iterators/class.js

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+'use strict';
+
+class TaskList {
+    constructor() {
+      this.tasks = [];
+    }
+
+    addTasks(...task) {
+      this.tasks = this.tasks.concat(task);
+    }
+    [Symbol.iterator]() {
+        return new ArrayIterator(this.tasks);
+    }
+
+  }
+class ArrayIterator {
+    constructor(array) {
+      this.array = array.map(array => array).sort();
+      this.index = 0;
+    }
+    next() {
+      let result = { value: undefined, done: true };
+      if ( this.index < this.array.length ) {
+          result.value = this.array[this.index];
+          result.done = false;
+          this.index +=1;
+      }
+      return result;    
+    }
+}
+
+let taskList = new TaskList();
+taskList.addTasks("Изучить JavaScript","Изучить ES6");
+
+for (let task of taskList) {
+  console.log(task);
+}

Iterators/randomGenerator.js

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+'use strict';
+
+let randomGenerator = {
+    generate() {
+        return this[Symbol.iterator]();
+    } ,
+
+    [Symbol.iterator]() {
+        let count = 0;
+
+        return {
+            next() {
+                let value = Math.ceil(Math.random() * 100);
+                let done = count > 9;                        //change this parameter to control randomizing
+                count++;
+                return {value, done};
+            }
+        }; 
+    }
+};
+let random = randomGenerator.generate(); // generate one random number
+console.log(random.next().value);
+// console.log(random.next().done);
+for(let random of randomGenerator) {     // generate ? random numbers
+    console.log(random)
+}

Practika.1.js

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+'use strict';
+
+function sum(a, b) {
+  if (typeof(a) === 'number' && typeof(b) === 'number') {
+    return a + b;
+  } else {
+    throw new Error('a and b should be numbers');
+  }
+}
+
+try {
+  console.log(sum(2, 3));
+} catch (e) {
+  console.log(e.message);
+}
+
+try {
+  console.log(sum(7, 'A'));
+} catch (e) {
+  console.log(e.message);
+}

Practika.js

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+let wtvr =0; 
+const fun = (...args) => {
+	if(args.length % 2 === 0 && args.length !== 0) {
+	    for(let value of args){
+	            wtvr += value ;
+     	        } 
+     	 return fun;
+	}
+	if (args.length % 2 === 1 && args.length !== 0) {
+		for(let value of args){
+		        wtvr -= value ;
+		        } 
+	     return fun;
+	}
+	if(args.length === 0) 
+	return wtvr ;
+}
+console.log(fun(4,5,9)(141,18)());
+// (new Date().toLocaleString('ru', {
+// 	weekday: 'long',
+// 	year:    'numeric',
+// 	month:   'long',
+// 	day:     'numeric',
+// 	hour:    'numeric',
+// 	minute:  'numeric',
+// 	second:  '2-digit',
+//   })); 
+
+// const args = [1,2,3];
+// const a = () => {for(let value of args){
+// 			wtvr -= value ;
+// 			} 
+// 	 return wtvr;
+// 		}
+// console.log(a);

basfa.js

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+'use strict'
+
+const puppeteer = require('puppeteer');
+// const devices = require('puppeteer/DeviceDescriptors');
+
+(async () => {
+  const browser = await puppeteer.launch({headless: false});
+  const page = await browser.newPage();
+//   await page.emulate(devices['iPhone 6']);
+  await page.goto('https://docs.google.com/spreadsheets/d/1qxsET43yE_B6UYMZC2Cb4aheUcXeKdBAUmAkeoQn-eA/edit#gid=1811612640');
+  await page.setViewport({width: 2000, height: 2000})
+  await page.waitFor(1000);
+  await page.screenshot({path: 'kel1.png'});
+//   await page.screenshot({path: 'full1.png', fullPage: true});
+  await browser.close();
+})();

class.js

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+'use strict';
+class Task {
+    constructor(title = Task.getDefault_Title()) {
+        this._title = title;
+        this._done = false;
+    }
+
+    get done() {
+        return this._done ? 'Complited' : 'It`ll be complited as soon as it can be'
+    }
+    
+    set done(value) {
+        if(typeof value === 'boolean') 
+        this._done = value;
+        else 
+        console.error('Дэбилы, тут нужен булеан')
+    }
+
+    complite() {
+        this.done = true;
+    }
+    
+    static getDefault_Title() {
+        return 'My upcomming task';
+    }
+}
+let task = new Task('Learn class in ES6');
+console.log(task._done,task.done);
+task.complite();
+console.log(task._done,task.done);
+
+
+// let task2 = new Task();
+// console.log(task._title);
+// console.log(task2._title);
+// task.complite(); 

getRozklad.js

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+'use strict';
+const puppeteer = require('puppeteer');
+
+// let scrape =
+ (async () => {
+    const browser = await puppeteer.launch({headless: false});
+    const page = await browser.newPage();
+
+    
+    await page.goto('http://rozklad.kpi.ua/Schedules/ScheduleGroupSelection.aspx');
+     await page.waitFor(1000);
+    await page.focus('#ctl00_MainContent_ctl00_txtboxGroup');
+     await page.type('#ctl00_MainContent_ctl00_txtboxGroup','ІП-71',{delay: 100});         //Type the group 
+    // await page.keyboard.press('ArrowDown',{delay: 100});
+    await page.waitForSelector('#ctl00_MainContent_ctl00_btnShowSchedule');
+    await page.click('#ctl00_MainContent_ctl00_btnShowSchedule',{clickCount: 100000000000});
+    await page.keyboard.press('Enter',{delay: 100});
+    await page.waitFor(8000);
+    
+    // const result = await page.evaluate(() => {
+    //     let data = [];
+    //     let elems = document.querySelectorAll('.product_pod');
+    //     for(let elem of elems){
+    //         let title = elem.childNodes[5].innerText;
+    //         let price = elem.childNodes[7].children[1].innerText; 
+
+    //         data.push({title, price}); 
+        
+    //     }
+    //     return data;
+    // });
+    await browser.close();
+    // return result;
+})();
+
+// scrape().then((value) => {
+//     console.log(value); 
+// });

get_set.js

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+'use strict';
+function User(fullName) {
+    this.fullName = fullName;
+    let separate = this.fullName.split(' ');
+    Object.defineProperties(this,{
+        firstName : {
+            get: () => this.firstName = separate[0],
+            set: value => {
+                separate[0] = value;
+                return this.fullName = separate.join(' ');
+                }
+    
+        },
+        lastName: {
+            get: () => this.lastName = separate[1] ,
+            set: value =>   {
+                separate[1] = value;
+                return this.fullName = separate.join(' ');
+                }
+    
+        }
+    });
+}
+
+    
+let vasya = new User("Петя Петров");
+console.log( vasya.firstName ); 
+console.log( vasya.lastName ); 
+vasya.lastName = 'Сидоров';
+console.log( vasya.fullName );
+let anon = new User("TheMan WHoSoldTheWorld");
+console.log( anon.fullName);
+anon.firstName = 'TheWoman';
+console.log( anon.fullName); 
+

index.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <title>Document</title>
+</head>
+<body>
+    <button></button>
+    <button></button>
+    <button></button>
+    <button></button>
+    <button></button>
+    <script src="randomGenerator.js"></script>
+</body>
+</html>

inheritance.js

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+'use strict';
+
+class Task {
+    constructor(title) {
+        this._title = title;
+        this._done = false;
+        Task.count += 1;
+        console.log(`The task is initialized : "${this._title}"`);
+    }
+
+    complite() {
+        this.done = false ;
+        console.log(`${this._title} complited.`);
+    }
+
+    get done() {
+        return this._done ? `The ${this._title} is complited` : 'Wasted'
+    }
+
+    set done(v) {
+        if (typeof this._done === 'boolean') this._done = v;
+        else console.log('type true or false')
+    }
+
+    get title() {
+        return this._title
+    }
+
+    set title(v) {
+        if(typeof v === 'String')this._title = v
+    }
+
+    static getDefaultTitle() {
+        return 'The task'
+    }
+}
+Task.count = 0;
+
+class SubTask extends Task {
+    constructor(title,parent) {
+        super(title);
+        this.parent = parent;   
+    }
+
+    complite() {
+        super.complite();
+        console.log(`Subtask '${this._title}' is complited`);
+    }   
+}
+         // Usage
+
+const task = new Task('Learn inheritance in JS');
+const subtask = new SubTask('Learn inheritance in ES6',Task);
+
+// console.log(task.title);
+// console.log(subtask.title);
+
+// subtask.title = 'New title';
+// console.log(subtask.title);
+
+console.log(`Tasks count = ${SubTask.count}`);
+console.log(`The DefaultTitle is '${SubTask.getDefaultTitle()}'`);
+
+subtask.complite();
+console.log(`Status : ${subtask.done}`);