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В тесте есть вопрос Можно ли использовать вложенную деструктуризацию в аргументах функции?. Не очень поняла, как это будет выглядеть ","creator":{"public_name":"Александра","id":809449,"is_tutor":false},"comments":[{"creator":{"public_name":"Ivan Gagarinov","id":75907,"is_tutor":true},"id":191489,"body":"**Александра**, здравствуйте! В уроке есть пример деструктуризации в аргументах функции:\n\n```javascript\nconst f = ({ firstName, age }) => {\n```","topic_id":99859},{"creator":{"public_name":"Александра","id":809449,"is_tutor":false},"id":191501,"body":"**Ivan Gagarinov**, это деструктуризация, это я поняла, а вложенная деструктуризация - это что? Как это надо написать?","topic_id":99859},{"creator":{"public_name":"Ivan Gagarinov","id":75907,"is_tutor":true},"id":191541,"body":"**Александра**, например так:\n\n```javascript\nconst f = ({ user: { firstName, age } }: { user: { firstName: string, age: number }, company: string}) => {\n```\n\nВнутри user находится вложенный объект.","topic_id":99859}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Деструктуризация","entity_url":null,"active":true}},{"id":103257,"title":"Для ответа на вопрос ```Как указать в аргументах функции, что некоторые значения свойств можно упустить при деструктуризации?``` было бы не плохо увидеть в теории пример такой деструктуризации)","plain_title":"Для ответа на вопрос Как указать в аргументах функции, что некоторые значения свойств можно упустить при деструктуризации? было бы не плохо увидеть в теории пример такой деструктуризации) ","creator":{"public_name":"Рамиль","id":587988,"is_tutor":false},"comments":[{"creator":{"public_name":"Elena Gromova","id":548102,"is_tutor":true},"id":195737,"body":"**Рамиль**, добрый день! Это вопрос на подумать и отсылает к уже изученной ранее теме \"опциональные параметры в функциях\"","topic_id":103257}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Деструктуризация","entity_url":null,"active":true}}],"lesson":{"exercise":{"id":2534,"slug":"typescript_basics_destructuring","name":null,"state":"active","kind":"exercise","language":"javascript","locale":"ru","has_web_view":false,"has_test_view":false,"reviewable":true,"readme":"## solution.ts\n\nРеализуйте функцию `lessonsCount()`, которая принимает на вход курс и возвращает количество лекций внутри него:\n\n```typescript\nconst course = { lessons: ['intro', 'lala'] };\nlessonsCount(course); // 2\n```\n\nИспользуйте внутри деструктуризацию, чтобы извлечь уроки прямо в параметрах функции.\n","prepared_readme":"## solution.ts\n\nРеализуйте функцию `lessonsCount()`, которая принимает на вход курс и возвращает количество лекций внутри него:\n\n```typescript\nconst course = { lessons: ['intro', 'lala'] };\nlessonsCount(course); // 2\n```\n\nИспользуйте внутри деструктуризацию, чтобы извлечь уроки прямо в параметрах функции.\n","has_solution":true,"entity_name":"Деструктуризация"},"units":[{"id":8568,"name":"theory","url":"/courses/typescript-basics/lessons/destructuring/theory_unit"},{"id":8820,"name":"quiz","url":"/courses/typescript-basics/lessons/destructuring/quiz_unit"},{"id":8631,"name":"exercise","url":"/courses/typescript-basics/lessons/destructuring/exercise_unit"}],"links":[],"ordered_units":[{"id":8568,"name":"theory","url":"/courses/typescript-basics/lessons/destructuring/theory_unit"},{"id":8820,"name":"quiz","url":"/courses/typescript-basics/lessons/destructuring/quiz_unit"},{"id":8631,"name":"exercise","url":"/courses/typescript-basics/lessons/destructuring/exercise_unit"}],"id":3796,"slug":"destructuring","state":"approved","name":"Деструктуризация","course_order":270,"goal":"Знакомимся с деструктуризацией в TypeScript","self_study":null,"theory_video_provider":null,"theory_video_uid":null,"theory":"В этом уроке разберем деструктуризацию в определении функций.\n\n## Использование деструктуризации\n\n**Деструктуризация** — это механизм, который распаковывает переданный как аргумент объект и присваивает его части локальным переменным функции. 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При этом он все равно остается объектом, поэтому в TypeScript его тип описывается после закрывающей фигурной скобки:\n\n```typescript\n// Обычное определение\nfunction f(user: { firstName: string, age: number }) {\n console.log(user.firstName, user.age)\n}\n\n// Деструктурированный объект\nfunction f({ firstName, age }: { firstName: string, age: number }) {\n console.log(firstName, age)\n}\n```\n\nЗдесь мы описали тип объекта внутри параметра функции и сразу же деструктурировали его.\n\nЕсли вынести определение типа в псевдоним, то можно сделать код поменьше:\n\n```typescript\ntype User = {\n firstName: string\n age: number\n}\n\nfunction foo({ firstName, age }: User) {\n console.log(firstName, age)\n}\n```\n\nЭтот же тип `User` можно будет использовать и в других местах. То же самое применимо и к массивам:\n\n```typescript\n// Обычное определение\nfunction foo(point: number[]) {\n console.log(point)\n}\n\n// Деструктурированный массив\nfunction foo([x, y]: number[]) {\n console.log(x, y)\n}\n\ntype Point = number[]\n\n// С псевдонимом\nfunction foo([x, y]: Point) {\n console.log(x, y)\n}\n```\n\nИспользование деструктуризации удобно, когда внутри функции нужно использовать несколько свойств объекта или элементов массива. 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__m__-_R_rdub_"><style data-mantine-styles="inline">.__m__-_R_6qrdub_{margin-top:0rem;padding-inline:var(--mantine-spacing-xs);width:100%;}@media(min-width: 48em){.__m__-_R_6qrdub_{margin-top:var(--mantine-spacing-xl);width:80%;}}@media(min-width: 62em){.__m__-_R_6qrdub_{padding-inline:var(--mantine-spacing-xl);}}</style><div style="margin-inline:auto;max-width:var(--mantine-breakpoint-xl)" class="__m__-_R_6qrdub_"><div style="color:var(--mantine-color-dimmed)" class="m_4451eb3a mantine-Center-root" data-inline="true"><div style="--ti-size:var(--ti-size-xs);--ti-bg:transparent;--ti-color:var(--mantine-color-indigo-light-color);--ti-bd:calc(0.0625rem * var(--mantine-scale)) solid transparent;margin-inline-end:calc(0.125rem * var(--mantine-scale));color:inherit" class="m_7341320d mantine-ThemeIcon-root" data-variant="transparent" data-size="xs"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-lock "><path d="M5 13a2 2 0 0 1 2 -2h10a2 2 0 0 1 2 2v6a2 2 0 0 1 -2 2h-10a2 2 0 0 1 -2 -2v-6"></path><path d="M11 16a1 1 0 1 0 2 0a1 1 0 0 0 -2 0"></path><path d="M8 11v-4a4 4 0 1 1 8 0v4"></path></svg></div><p style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Основы Typescript</p></div><h1 style="--title-fw:var(--mantine-h1-font-weight);--title-lh:var(--mantine-h1-line-height);--title-fz:var(--mantine-h1-font-size);margin-bottom:var(--mantine-spacing-xl)" class="m_8a5d1357 mantine-Title-root" data-order="1">Теория: Деструктуризация</h1><script type="application/ld+json">{"@context":"https://schema.org","@type":"LearningResource","name":"Деструктуризация","inLanguage":"ru","isPartOf":{"@type":"LearningResource","name":"Основы Typescript"},"isAccessibleForFree":"False","hasPart":{"@type":"WebPageElement","isAccessibleForFree":"False","cssSelector":".paywalled"}}</script><div class=""><div style="--alert-color:var(--mantine-color-indigo-light-color);margin-bottom:var(--mantine-spacing-lg);font-size:var(--mantine-font-size-lg)" class="m_66836ed3 mantine-Alert-root" id="mantine-_R_remqrdub_" role="alert" aria-describedby="mantine-_R_remqrdub_-body" aria-labelledby="mantine-_R_remqrdub_-title"><div class="m_a5d60502 mantine-Alert-wrapper"><div class="m_667f2a6a mantine-Alert-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-rocket "><path d="M4 13a8 8 0 0 1 7 7a6 6 0 0 0 3 -5a9 9 0 0 0 6 -8a3 3 0 0 0 -3 -3a9 9 0 0 0 -8 6a6 6 0 0 0 -5 3"></path><path d="M7 14a6 6 0 0 0 -3 6a6 6 0 0 0 6 -3"></path><path d="M14 9a1 1 0 1 0 2 0a1 1 0 1 0 -2 0"></path></svg></div><div class="m_667c2793 mantine-Alert-body"><div class="m_6a03f287 mantine-Alert-title"><span id="mantine-_R_remqrdub_-title" class="m_698f4f23 mantine-Alert-label">Полный доступ к материалам</span></div><div id="mantine-_R_remqrdub_-body" class="m_7fa78076 mantine-Alert-message"><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Зарегистрируйтесь и получите доступ к этому и десяткам других курсов</p><a style="--button-height:var(--button-height-xs);--button-padding-x:var(--button-padding-x-xs);--button-fz:var(--mantine-font-size-xs);--button-bg:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-hover:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-color:var(--mantine-color-white);--button-bd:none" class="mantine-focus-auto mantine-active m_77c9d27d mantine-Button-root m_87cf2631 mantine-UnstyledButton-root" data-variant="gradient" data-size="xs" href="/u/new"><span class="m_80f1301b mantine-Button-inner"><span class="m_811560b9 mantine-Button-label">Зарегистрироваться</span></span></a></div></div></div></div></div><div class="paywalled m_d08caa0 mantine-Typography-root"><p>В этом уроке разберем деструктуризацию в определении функций.</p>
<h2 id="heading-2-1">Использование деструктуризации</h2>
<p><strong>Деструктуризация</strong> — это механизм, который распаковывает переданный как аргумент объект и присваивает его части локальным переменным функции. В JavaScript он выглядит так:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">// Обычное определение
const f = (user) => {
console.log(user.firstName, user.age)
}
// Деструктурированный объект
const f = ({ firstName, age }) => {
console.log(firstName, age)
}
const user = { firstName: 'Smith', age: 30 }
f(user) // => 'Smith', 30</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Деструктурированный объект визуально похож на параметры функции. При этом он все равно остается объектом, поэтому в TypeScript его тип описывается после закрывающей фигурной скобки:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">// Обычное определение
function f(user: { firstName: string, age: number }) {
console.log(user.firstName, user.age)
}
// Деструктурированный объект
function f({ firstName, age }: { firstName: string, age: number }) {
console.log(firstName, age)
}</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Здесь мы описали тип объекта внутри параметра функции и сразу же деструктурировали его.</p>
<p>Если вынести определение типа в псевдоним, то можно сделать код поменьше:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">type User = {
firstName: string
age: number
}
function foo({ firstName, age }: User) {
console.log(firstName, age)
}</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Этот же тип <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">User</code> можно будет использовать и в других местах. То же самое применимо и к массивам:</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">// Обычное определение
function foo(point: number[]) {
console.log(point)
}
// Деструктурированный массив
function foo([x, y]: number[]) {
console.log(x, y)
}
type Point = number[]
// С псевдонимом
function foo([x, y]: Point) {
console.log(x, y)
}</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<p>Использование деструктуризации удобно, когда внутри функции нужно использовать несколько свойств объекта или элементов массива. В таком случае можно сразу извлечь их в параметрах функции, а не писать <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">user.firstName</code> или <code style="margin-bottom:var(--mantine-spacing-lg)" class="m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight m_e597c321 mantine-CodeHighlight-codeHighlight m_dfe9c588 mantine-InlineCodeHighlight-inlineCodeHighlight">point[0]</code> внутри тела функции.</p></div><div style="margin-block:var(--mantine-spacing-xl)" class=""><h2 style="--title-fw:var(--mantine-h2-font-weight);--title-lh:var(--mantine-h2-line-height);--title-fz:var(--mantine-h2-font-size);margin-bottom:var(--mantine-spacing-md)" class="m_8a5d1357 mantine-Title-root" data-order="2">Рекомендуемые программы</h2><style 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