Home work for Lesson_3

Author: Denis Neporada

HomeWorks/HomeWork_4/functions.js

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+// Task 1
+
+function call() {
+    this.name = prompt("What is your name?");
+}
+//call();
+var obj = {};
+call(obj);
+call(window);
+
+console.log(obj.name);
+console.log(window.name);
+
+// Task 2
+
+function findSum (number) {
+    number = +prompt("Please, put any number in: ");
+    var sum = 0;
+    for (var i = 0; i <= number; i++) {
+        sum += i;
+    }
+    console.log(sum);
+}
+
+findSum();
+
+// Task 3
+
+var vasya = { name: 'Вася', age: 23 };
+var masha = { name: 'Маша', age: 18 };
+var vovochka = { name: 'Вовочка', age: 6 };
+
+var people = [ vasya , masha , vovochka ];
+
+people.sort(function compare (a, b){
+    return a.age - b.age;
+});
+console.log(people);
+console.log(people[0].age);
+
+
+//Task 4
+
+var array = ['23', 'a', 'c', 'c', 'c', 'c', 'd', 'v', 'd', 'd', 'd',];
+
+function unique (arr) {
+    var uniqueArr = arr.filter(function (a, b){
+        return arr.indexOf(a) === b;
+    })
+    console.log(uniqueArr)
+}
+
+unique(array);
+

HomeWorks/HomeWork_4/strings.js

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+// Task 1
+
+var inputString = 'aaa@bbb@ccc';
+
+var newString = inputString.replace(/@/g, '!');
+
+console.log(newString);
+
+// Task 2
+
+var inputString = "aaa bbb ccc";
+
+var newString = inputString.substr(4, 3);
+
+var newString = inputString.substring(4, 7);
+
+var newString = inputString.slice(4,7);
+
+console.log(newString);
+
+// Task 3
+
+var date = '2025-12-31';
+
+var year = date.substr(0,4);
+var months = date.substr(5, 2);
+var day = date.substr(8, 2);
+
+var newDate = day + '/' + months + '/' + year;
+console.log(newDate);
+
+// Task 4
+
+var str = 'js';
+
+var newStr = str.toUpperCase();
+console.log(newStr);
+
+// Task 5
+
+var str = 'я учу javascript!';
+
+var length = str.length;
+
+console.log(length);
+
+// Task 6
+
+var str = 'Реализуйте обрезание длинного текста по следующему ';
+
+function cutStr (newStr, n) {
+    var newStr = str.length;
+    if (newStr > 5) {
+        return str[0] + '...';
+    }
+    console.log(newStr);
+}
+cutStr()
+
+// Task 7
+
+var str = 'я учу javascript!';
+var arr = str.split(' ');
+console.log(arr);
+
+// Task 8
+
+var arr = ['я', 'учу', 'javascript', '!'];
+var str = arr.join('+');
+console.log(str);
+
+// Task 9
+
+var str = 'я учу javascript!';
+
+var upgrade = str[0].toUpperCase() + str.substr(1);
+
+console.log(upgrade);
+
+// Task 10
+
+var str = 'я учу javascript!';
+
+console.log("Data:", str);
+
+var arr = str.split(" ");
+for (var i = 0; i < arr.length; i++) {
+    var s = arr[i].slice(0, 1);
+    s = s.toUpperCase();
+    arr[i] = arr[i].slice(1);
+    arr[i] = s + arr[i];
+}
+var result = arr.join(" ");
+console.log("Result:", result);
+
+// Task 11
+
+var str = 'var_test_text';
+
+var arr = str.split('_');
+for (var i = 1; i < arr.length; i++) {
+    var upperFigureSecondWord = arr[1].slice(0, 1);
+    upperFigureSecondWord = upperFigureSecondWord.toUpperCase();
+    arr[1] = arr[1].slice(1);
+    arr[1] = upperFigureSecondWord + arr[1];
+
+    var upperFigureThirdWord = arr[1].slice(0, 1);
+    upperFigureThirdWord = upperFigureThirdWord.toUpperCase();
+    arr[2] = arr[2].slice(1);
+    arr[2] = upperFigureSecondWord + arr[2];
+}
+var outcome = arr.join('');
+console.log(outcome);
+
+// Task 12
+
+var inputStr ='12345678',
+    reversedStrInArray = str.split('').reverse(),
+    outputStr = '';
+
+for (var i = 0; i <reversedStrInArray.length; i++) {
+    if ((i +1) %3 === 0) {
+    outputStr += (reversedStrInArray[i] + ' ')
+    } else {
+        outputStr += reversedStrInArray[i];
+    }
+}
+
+console.log(a);