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@@ -0,0 +1,93 @@
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+//-----------------------------------------------------------sort---------------------------------------------------------------------------
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+
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+var persons = [{
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+ name: "Иван",
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+ age: 17
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+ },
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+ {
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+ name: "Мария",
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+ age: 35
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+ },
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+ {
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+ name: "Алексей",
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+ age: 73
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+ },
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+ {
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+ name: "Яков",
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+ age: 12
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+ },
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+]
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+
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+function sort(array, key, increase = true) {
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+ if (increase) {
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+ array.sort(function (a, b) {
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+ if (a[key] > b[key]) {
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+ return 1;
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+ }
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+ if (a[key] < b[key]) {
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+ return -1;
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+ }
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+ return 0;
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+ });
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+ } else {
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+ array.sort(function (a, b) {
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+ if (a[key] < b[key]) {
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+ return 1;
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+ }
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+ if (a[key] > b[key]) {
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+ return -1;
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+ }
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+ return 0;
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+ });
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+ }
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+ return array;
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+};
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+
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+// console.log(sort(persons, "age")); //сортирует по возрасту по возрастанию
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+// console.log(sort(persons, "name"));
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+// console.log(sort(persons, "age", true));
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+// console.log(sort(persons, "name", true));
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+// console.log(sort(persons, "name", false)); //сортирует по имени по убыванию
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+// console.log(sort(persons, "age", false)); //сортирует по имени по убыванию
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+
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+//-----------------------------------------------------------array map----------------------------------------------------------------------
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+
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+let arrayMap = ["1", {}, null, undefined, "500", 700];
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+
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+let arrayMap2 = arrayMap.map((item) => {
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+ if (typeof item == "string") return isNaN(parseInt(item, 10)) ? item : parseInt(item, 10);
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+ return item;
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+});
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+
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+// console.log(arrayMap2);
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+
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+//-----------------------------------------------------------array reduce--------------------------------------------------------------------
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+
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+let arrayReduce = ["0", 5, 3, "string", null];
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+
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+let arrayPow = arrayReduce.reduce((a, b) => (typeof b == "number" ? a * b : a), 1);
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+
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+console.log(arrayPow);
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+
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+//-----------------------------------------------------------object filter--------------------------------------------------------------------
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+
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+var phone = {
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+ brand: "meizu",
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+ model: "m2",
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+ ram: 2,
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+ color: "black",
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+};
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+
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+function filter(obj) {
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+ let obj2 = {};
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+ for (let key in obj) {
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+ if (key == "color" || obj[key] == 2) {
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+ obj2[key] = obj[key];
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+ }
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+ }
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+ return obj2;
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+}
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+
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+console.log(filter(phone));
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+
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+//-----------------------------------------------------------object map--------------------------------------------------------------------
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