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typescript keyof type

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EnzoK answered on September 20, 2020 Popularity 10/10 Helpfulness 2/10

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typescript keyof type

Comment

type Arrayish = { [n: number]: unknown };
type A = keyof Arrayish;
    
type A = number
 
type Mapish = { [k: string]: boolean };
type M = keyof Mapish;
    
type M = string | number
Try

Popularity 10/10 Helpfulness 2/10 Language typescript

Source: www.typescriptlang.org

Tags: keyof typescript

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Contributed on Oct 26 2022

EnzoK

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typescript keyof

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interface Person {
  name: string;
  age: number;
  location: string;
}

type K1 = keyof Person; // "name" | "age" | "location"
type K2 = keyof Person[]; // "length" | "push" | "pop" | "concat" | ...
type K3 = keyof { [x: string]: Person }; // string

Popularity 10/10 Helpfulness 5/10 Language typescript

Source: Grepper

Tags: keyof keyo

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Contributed on Sep 20 2020

SHARKO_MAN

0 Answers Avg Quality 2/10

typescript keyof typeof

Comment

enum ColorsEnum {
    white = '#ffffff',
    black = '#000000',
}

type Color = keyof typeof ColorsEnum; // 'white' | 'black'

let colorLiteral: Color
colorLiteral = "white"  // OK
colorLiteral = "black"  // OK
colorLiteral = "red"    // Error...

Popularity 10/10 Helpfulness 4/10 Language typescript

Source: Grepper

Tags: keyof keyo

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Contributed on Sep 01 2022

Scriper

0 Answers Avg Quality 2/10

typescript keyof object

Comment

type staffKeys = 'name' | 'salary';
function getProperty<T, K extends staffKeys>(obj: T, key: K): T[K] {
return obj[key];
}

Popularity 10/10 Helpfulness 2/10 Language typescript

Source: blog.logrocket.com

Tags: keyof keyo

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Contributed on May 26 2022

temitope agboola

0 Answers Avg Quality 2/10

typescript keyof in java 8

Comment

interface User {
  id: number;
  userName: string;
  firstName: string;
  lastName: string;
}

type UserProp = keyof User; // "id" | "userName" | "firstName" | "lastName"

Popularity 10/10 Helpfulness 2/10 Language typescript

Source: Grepper

Tags: java-8 ja

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Contributed on Sep 01 2022

Scriper

0 Answers Avg Quality 2/10

typescript keyof type

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