123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149 |
- //1
- let a1 = () => alert('Привет')
- //2
- let b1 = (b) => b = b ** 3
- //3
- let c1 = (a, b) => (a + b) / 2
- //4
- let d1 = (a = 0, b = 0, c = 0) => g = a + b + c
- //5
- let e1 = (a, b) => {
- if (b === undefined) {
- z = Math.round(Math.random()*a)
- } else {
- z = ((Math.round(Math.random() * (b - a))+a))
- }
- return z
- }
- //6
- let p = ""
- let f1 = (...arguments) => {
-
- for (i = 0; i < arguments.length; i++){
- p = p + "," + arguments[i]
-
- }
-
- alert(`Hello ${p}`)
- }
- //7
- let sum1 = 0
- let g1 = (...arguments) => {
- for (i = 0; i < arguments.length; i++){
- sum1 += arguments[i]
- }
- return sum1
- }
- //sort
- var persons = [
- {name: "Иван", age: 17},
- {name: "Мария", age: 35},
- {name: "Алексей", age: 73},
- {name: "Яков", age: 12},
- ]
- function sort1(array, key, bool = true) {
-
- if (bool) {
- array.sort((a, b) => a[key] > b[key] ? 1 : -1)
- }
- else {
- array.sort((a, b) => a[key] < b[key] ? 1 : -1)
- return console.log(array)
- }
- }
- //sort(persons, "age"); //сортирует по возрасту по возрастанию
- sort1(persons, "name", false); //сортирует по имени по убыванию
- //array map
- ["1", {}, null, undefined, "500", 700].map(x => typeof(x) === 'string' ? parseInt(x) : x)
- //array reduce
-
- ["0", 5, 3, "string", null].reduce(f)
- function f(a, b) {
- if (typeof (a) === 'number' ) {
- a = a
- } else {
- a = 1
- }
- if (typeof (b) === 'number') {
- b = b
- } else {
- b = 1
- }
- return a * b
- }
- //object filter
- var phone = {
- brand: "meizu",
- model: "m2",
- ram: 2,
- color: "black",
- };
- function filter(object , search ,value) {
- for (let key in object) {
- if (key != search & object[key] != value)
- delete object[key];
-
- }
- return phone
- }
- filter(phone, "color", 2)
- //object map ????????
- function map(obj, funct){
- for(key in obj){
- funct(obj, key, obj[key]);
- delete obj[key];
- }
- return obj;
- }
- function by(obj, key, value){
- obj[key + "_"] = value + "$";
- return obj;
- }
- console.log(map({ name: "Иван", age: 18, tel: 16780 }, by))
- //Sum
- function sum(a){
- if (a === 1){
- return a
- }
- else {
- return a + sum(a - 1)
- }
-
- }
|