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@@ -0,0 +1,149 @@
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+//1
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+let a1 = () => alert('Привет')
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+
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+//2
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+
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+let b1 = (b) => b = b ** 3
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+
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+//3
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+
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+let c1 = (a, b) => (a + b) / 2
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+
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+//4
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+
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+let d1 = (a = 0, b = 0, c = 0) => g = a + b + c
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+
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+//5
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+
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+let e1 = (a, b) => {
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+ if (b === undefined) {
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+ z = Math.round(Math.random()*a)
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+ } else {
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+ z = ((Math.round(Math.random() * (b - a))+a))
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+ }
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+ return z
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+}
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+
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+//6
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+let p = ""
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+let f1 = (...arguments) => {
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+
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+ for (i = 0; i < arguments.length; i++){
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+ p = p + "," + arguments[i]
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+
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+ }
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+
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+ alert(`Hello ${p}`)
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+}
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+
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+//7
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+let sum1 = 0
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+let g1 = (...arguments) => {
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+ for (i = 0; i < arguments.length; i++){
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+ sum1 += arguments[i]
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+ }
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+ return sum1
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+}
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+
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+
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+//sort
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+
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+var persons = [
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+ {name: "Иван", age: 17},
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+ {name: "Мария", age: 35},
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+ {name: "Алексей", age: 73},
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+ {name: "Яков", age: 12},
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+]
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+
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+
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+function sort1(array, key, bool = true) {
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+
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+ if (bool) {
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+ array.sort((a, b) => a[key] > b[key] ? 1 : -1)
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+ }
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+ else {
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+ array.sort((a, b) => a[key] < b[key] ? 1 : -1)
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+ return console.log(array)
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+ }
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+}
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+
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+//sort(persons, "age"); //сортирует по возрасту по возрастанию
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+sort1(persons, "name", false); //сортирует по имени по убыванию
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+
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+//array map
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+
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+["1", {}, null, undefined, "500", 700].map(x => typeof(x) === 'string' ? parseInt(x) : x)
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+
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+//array reduce
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+
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+["0", 5, 3, "string", null].reduce(f)
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+
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+function f(a, b) {
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+
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+
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+ if (typeof (a) === 'number' ) {
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+ a = a
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+ } else {
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+ a = 1
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+ }
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+ if (typeof (b) === 'number') {
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+ b = b
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+ } else {
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+ b = 1
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+ }
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+ return a * b
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+
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+}
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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(object , search ,value) {
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+ for (let key in object) {
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+ if (key != search & object[key] != value)
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+ delete object[key];
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+
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+
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+ }
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+ return phone
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+}
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+
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+filter(phone, "color", 2)
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+
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+//object map ????????
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+
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+function map(obj, funct){
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+ for(key in obj){
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+ funct(obj, key, obj[key]);
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+ delete obj[key];
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+ }
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+ return obj;
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+}
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+
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+function by(obj, key, value){
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+ obj[key + "_"] = value + "$";
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+ return obj;
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+}
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+console.log(map({ name: "Иван", age: 18, tel: 16780 }, by))
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+
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+
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+//Sum
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+
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+function sum(a){
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+ if (a === 1){
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+ return a
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+ }
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+ else {
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+ return a + sum(a - 1)
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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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