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+// html tree
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+let body = {
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+ name: 'body',
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+ children: [
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+ {
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+ name: 'div',
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+ children: [
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+ {
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+ name: 'span',
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+ children: 'Enter a data please',
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+ },
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+ {
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+ name: 'br',
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+ },
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+ {
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+ name: 'input',
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+ attrs: {
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+ type: 'text',
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+ id: 'name',
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+ },
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+ },
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+ {
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+ name: 'input',
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+ attrs: {
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+ type: 'text',
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+ id: 'name',
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+ },
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+ },
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+ ]
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+ },
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+ {
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+ name: 'div',
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+ children: [
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+ {
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+ name: 'button',
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+ attrs: {
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+ id: 'ok',
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+ children: 'OK',
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+ }
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+ },
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+ {
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+ name: 'button',
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+ attrs: {
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+ id: 'cancel',
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+ children: 'Cancel',
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+ }
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+ },
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+ ]
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+ }
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+ ],
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+};
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+
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+// declarative fields
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+let notebook = {
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+ brand: prompt("Enter laptop brand: ") || "HP",
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+ type: prompt("Enter laptop type: ") || "440 G4",
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+ model: prompt("Enter your laptop model: ") || "Y7Z75EA",
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+ ram: +prompt("Enter the amount of laptop RAM: ") || 4,
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+ size: prompt("Enter laptop size: ") || 14,
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+ weight: +prompt("Enter the weight of the laptop: ") || 1.8,
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+
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+ resolution: {
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+ width: +prompt("Enter the width of the laptop: ") || 1920,
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+ height: +prompt("Enter the length of the laptop: ") || 1080,
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+ },
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+};
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+
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+let phone = {
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+ brand: prompt("Enter phone name: ") || "meizu",
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+ model: prompt("Enter your phone model: ") || "m2",
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+ ram: +prompt("Enter the amount of RAM: ") || 2,
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+ color: prompt("Enter color: ") || "black",
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+};
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+let person = {
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+ name: prompt("Enter a name: ") || "Donald",
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+ surname: prompt("Enter a surname: ") || "Trump",
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+ married: confirm("Are you married?") || true,
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+};
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+
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+// object links
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+person["smartphone"] = smartphone;
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+person["laptop"] = laptop;
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+laptop["owner"] = person;
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+smartphone["owner"] = person;
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+
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+//or
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+person.smartphone = smartphone;
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+person.laptop = laptop;
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+laptop.owner = person;
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+smartphone.owner = person;
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+
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+// imperative array fill 3
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+let arr = [];
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+
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+alert("Введите названия ваших любимых фруктов: ")
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+arr[0] = prompt("Первый фрукт: ");
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+arr[1] = prompt("Второй фрукт: ");
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+arr[2] = prompt("Третий фрукт: ");
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+alert(arr + " " + "я це люблю!");
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+
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+// while confirm
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+while (true) {
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+ var a = confirm();
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+ if (a === true || a == null) break;
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+}
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+
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+// array fill
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+let arrayValue = [];
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+let elementPush;
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+
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+while (elementPush !== null) {
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+ elementPush = prompt("Enter element: ");
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+
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+ if (elementPush === null) {
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+ break;
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+ }
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+
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+ arrayValue.push(elementPush);
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+}
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+console.log(arrayValue);
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+
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+// array fill nopush
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+let elementAdd = [];
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+
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+for (let i = 0, j; j !== null; i++) {
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+ j = prompt("Enter element: ");
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+
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+ if (j === null) {
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+ break;
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+ }
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+
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+ elementAdd[i] = j;
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+}
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+console.log(elementAdd);
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+
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+// infinite probability
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+var i = 0;
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+while (true) {
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+ if (Math.random() > 0.9) {
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+ alert(++i);
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+ break;
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+ }
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+ else i++;
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+}
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+
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+// empty loop
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+let choiceUser;
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+do {
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+ choiceUser = prompt("ОK или Отмена?");
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+} while (choiceUser != "");
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+
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+// progression sum
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+var functionResult = '';
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+n = +prompt("Введите N:");
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+for (let i=1; i<=n; i= i+3) {
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+functionResult = functionResult + i + ' ';
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+}
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+console.log(functionResult);
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+
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+// chess one line
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+let str = ' ';
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+
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+for (let i = 0;i<10;i++)
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+ if (i % 2 === 1) {
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+ str += ' '
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+ }
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+ else {
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+ str += '#'
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+ }
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+" # # # # # "
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+// or
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+let str = ' ';
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+
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+for(let i = 0;i<10;i++)
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+ if (i % 2 === 0) {
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+ str += '#'
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+ }
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+ else {
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+ str += ' '
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+ }
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+" # # # # # "
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+
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+// numbers
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+let str = '';
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+
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+for (let i=0;i<10;i++) {
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+ for (j=0;j<10;j++) {
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+ str += String(j); //or new String - преобразовано в строку с помощью глобального объекта напрямую
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+ }
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+ str += "\n";
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+}
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+console.log(str);
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+
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+// chess 1
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+let a=12, b=10, str=''; // b-строки, a-символы, размер доски можно легко менять - изменяя значения a и b
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+while (b--) str += (b%2?'#.':'.#').repeat(a/2)+((a%2)?b%2?'#':'.':'')+'\n';
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+console.log(str);
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+
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+// cubes
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+let enteredValue = prompt("Укажите число N для вычисления куба: ");
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+let arrayValue = [];
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+
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+for (let i = 0; i < enteredValue; i++) {
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+ arrayValue[i] = Math.pow(i, 3);
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+}
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+console.log(arrayValue);
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+
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+// multiply table
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+var result = 'x ';
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+for (var i = 0; i < 11; i++) {
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+
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+ for (var j = 0; j < 11; j++) {
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+
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+ if (i == 0 && j > 0) {
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+ result += '[' + j + ']';
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+ }
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+ else if (j == 0 && i>0) {
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+ result += '[' + i + '] ';
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+ }
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+ else if (i>0 && j>0) {
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+ result += (i*j) + ' ';
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+ }
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+ }
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+ result += '\n'
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+}
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+alert(result);
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+
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+// matrix to html table
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+//Решение в html - зайти в html - Open with Live Server//
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+
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+// Задание на синий пояс: Треугольник
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+
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+// option 1
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+function pyramid(n){
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+ for (let i=1; i<= n; i++) {
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+ let str = '.'.repeat(n-i);
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+ let str2 = '#'. repeat(i*2 -1);
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+ console.log(str + str2 + str);
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+ }
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+}
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+pyramid(6);
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+
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+// option 2
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+var lines = line = 6;
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+a='.';
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+b='#';
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+while (line-->0) console.log(Array(line+1).join(a) +Array(2*(lines-line)).join(b) +Array(line+1).join(a));
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Евгения Акиншина