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Воробьев #14
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Воробьев #14
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@@ -70,7 +70,9 @@ const obj7: ThirdType = { | |
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| const array = [obj1, obj2, obj3, obj4, obj5, obj6, obj7]; | ||
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| function filter(array: Array<FirstType | SecondType | ThirdType>, type: string) { | ||
| function filter(array: Array<FirstType | SecondType | ThirdType>, type: string) | ||
| { | ||
| return array.filter((x): x is FirstType | SecondType | ThirdType => typeof x === type); | ||
| } | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Работать не будет, т.к. в рантайме у x будет тип Object => ни один объект не попадет результирующий массив |
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| filter(array, 'FirstType'); | ||
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@@ -8,5 +8,10 @@ | |
| function add(x: string, y: string): string; | ||
| function add(x: number, y: number): number; | ||
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| function add(x: any, y: any): any | ||
| { | ||
| return x+y; | ||
| } | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Зачтено на 3 балла |
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| add('20', '21'); //2021 | ||
| add(20, 21); //41 | ||
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@@ -12,3 +12,15 @@ type FooType = { | |
| a: number | ||
| b: string | ||
| }; | ||
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| /** | ||
| * type не поддерживает изменения и наследования, может обЪеденять в себе другие, позволяет задать псевдоним | ||
| * для любой разновидности типа | ||
| */ | ||
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| /** | ||
| * interface можно изменять и расширять, при создании нового interface с уже использованным именем они сольются | ||
| * в один, interface представляет именнованный тип объекта | ||
| */ | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Зачтено на 3 балла |
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@@ -73,7 +73,7 @@ export function logPerson(person: Person) { | |
| console.log(` - ${person.name}, ${person.age}, ${additionalInformation}`); | ||
| } | ||
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| export function filterUsers(persons: Person[], criteria: User): User[] { | ||
| export function filterUsers(persons: Person[], criteria: {type?: string, name?: string, age?: number, occupation?: string}): User[] { | ||
| return persons.filter(isUser).filter((user) => { | ||
| const criteriaKeys = Object.keys(criteria); | ||
| return criteriaKeys.every((fieldName) => { | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Зачтено на 3 балла |
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There was a problem hiding this comment.
Choose a reason for hiding this comment
The reason will be displayed to describe this comment to others. Learn more.
Зачтено на 3 балла