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OlegLustenkoOlegLustenko
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Merge pull request #9 from EasyCode-JavaScriptReact-v1/homework_7
homework_7
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‎js-core/homeworks/homework-7/index.html‎

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Home work 7</title>
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</head>
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<body>
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<script src="src/main.js"></script>
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</body>
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</html>

‎js-core/homeworks/homework-7/src/main.js‎

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//Task1
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function add(arg1) {
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return function (arg2) {
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return function (arg3) {
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return arg1 = arg1 + arg2 + arg3;
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};
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};
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};
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console.log('Task1 ', add(1)(2)(3)); // 6
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console.log('Task1 ', add(10)(5)(15)); // 30
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//Task2
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function patternModule() {
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let count = 0;
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return {
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method: function () {
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return count += 1;
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},
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setToZero: function() {
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return count = 0;
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}
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};
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};
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//patternModule
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let test = patternModule(); // 0
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console.log('Task2 ', test.method()); //1
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console.log('Task2 ', test.method()); //2
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console.log('Task2 ', test.method()); //3
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console.log('Task2 ', test.setToZero());
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console.log('Task2 ', test.method());
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//Task3
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let jun = {};
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function methodCounter(obj, name, num, fn) {
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let counter = 0;
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obj[name] = function(...args) {
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if(counter < num) {
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counter += 1;
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return `Call number ${counter}, sum of arguments = ${fn(args)}`;
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} else {
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return 'ERROR ! add more methods';
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}
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}
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};
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methodCounter(jun, 'logger', 2, function (args) {
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let sumArgs = 0;
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for (let i = 0; i < args.length; i++) {
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sumArgs = sumArgs + args[i];
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};
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return sumArgs;
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});
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console.log('Task3 ', jun.logger(1, 2, 3, 4)); // 2, 10
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console.log('Task3 ', jun.logger(5, 5, 5, 5)); // 1, 20
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console.log('Task3 ', jun.logger(5, 5)); // ERROR ! add more methods
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//Super
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let jun2 = {};
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function methodCounter2(obj, name, num, fn) {
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let counter = num;
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obj[name] = function(...args) {
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if(counter > 0) {
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counter--;
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return `Call number ${counter + 1}, sum of arguments = ${fn(args)}`;
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} else {
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return 'ERROR ! add more methods';
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};
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};
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obj.addCounter = function(initialCounter) {
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return counter = initialCounter;
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};
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};
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let methodName = methodCounter2(jun2, 'logger', 2, function (args) {
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let sumArgs = 0;
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for (let i = 0; i < args.length; i++) {
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sumArgs = sumArgs + args[i];
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};
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return sumArgs;
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});
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console.log('Super ', jun2.addCounter(10, methodName));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.addCounter(3, methodName));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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console.log('Super ', jun2.logger(1, 2, 3, 4));
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//Задачи:
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function factorial(n) {
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if(n > 1) {
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return n * factorial(n - 1);
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};
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return n
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};
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console.log(factorial(5));
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function sumToRecursion(n) {
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if(n > 1) {
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return n + factorial(n - 1);
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};
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return n;
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};
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console.log(sumToRecursion(4));
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function sumToCycle(n) {
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let k = n;
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for (let i = 1; i < k; i++) {
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n = n + (k - i);
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};
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return n;
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};
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console.log(sumToCycle(4));
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function sum (arg1) {
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return function (arg2) {
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return arg1 + arg2;
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};
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};
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console.log(sum(5)(-1));
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function makeBuffer() {
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let buffer = '';
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return function (value) {
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if(value == undefined) {
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return buffer;
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};
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return buffer = buffer + value;
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};
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};
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let buffer = makeBuffer();
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console.log(buffer(1));
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console.log(buffer(2));
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console.log(buffer(3));
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console.log(buffer());
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function makeBuffer2() {
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let buff = '';
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function buffer2 (value) {
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if(value == undefined) {
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return buff;
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};
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return buff = buff + value;
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};
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buffer2.clear = function () {
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buff = '';
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};
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return buffer2;
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};
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let buffer2 = makeBuffer2();
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buffer2("Тест");
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buffer2(" тебя не съест ");
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console.log( buffer2() ); // Тест тебя не съест
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buffer2.clear();
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console.log( buffer2() );
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let users = [{
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name: "Вася",
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surname: 'Иванов',
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age: 20
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}, {
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name: "Петя",
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surname: 'Чапаев',
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age: 25
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}, {
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name: "Маша",
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surname: 'Медведева',
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age: 18
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}];
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function byField(field) {
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return function (a, b) {
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return a[field] > b[field]? 1: -1;
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};
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};
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users.sort(byField('name'));
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users.forEach(function(user) {
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console.log( user.name );
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}); // Вася, Маша, Петя
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users.sort(byField('age'));
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users.forEach(function(user) {
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console.log( user.name );
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}); // Маша, Вася, Петя

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