Created
January 31, 2018 03:20
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| const [,, first, second] = array; | |
| const [one, ...rest] = array; // разделит массив на остатки | |
| const { name, age } = me; | |
| const { name: firstName, age } = me; | |
| const me = { | |
| age: 26, | |
| gender: "male", | |
| city: "nsk" | |
| }; | |
| const { name = 'noname', age } = me; | |
| // ArrowFunctions (Сохраняют контекст) | |
| const a3 = a.map(el => el * 2); | |
| const increment = n => n + 1; | |
| // Functions arguments | |
| const sayHelloNew = (name = 'noname') => `Hello new ${name}`; | |
| // | |
| const sayHelloNew = (name = 'noname') => ({ | |
| name: `Hello new ${name}` | |
| }) | |
| // вернет объект, потому как () вместо return | |
| const sayHello = (...people) => console.log(`Hello ${people.join(', ')}`); | |
| sayHello('Alex', 'Test', 'Test2'); | |
| // people - это РЕАЛЬНЫЙ массив | |
| const sayHello = (firstPerson, ...others) => console.log(`Hello ${firstPerson} and ${others.join(', ')}`); | |
| // Деструктуризация внутри аргументов функции | |
| let Person = ({name = 'noname', age = 0, city = 'Nowhere'}) => { | |
| console.log( `Hello from ${city}! my name is ${name}, I am ${age} years old.`) | |
| } | |
| let me = { | |
| name: "alex", | |
| city: "nsk" | |
| } | |
| Person(me); | |
| // Objects | |
| const name = "alex"; | |
| const city = "nsk"; | |
| const me = { | |
| name, | |
| city | |
| } | |
| // Назвать свойство из переменной | |
| let propName = 'name'; | |
| let user = { | |
| [propName]: 'alex' | |
| } | |
| const obj = { | |
| sayHello() { | |
| return `Hello ${this.name}` | |
| }, | |
| name: "alex" | |
| } |
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