Does Typescript support extracted interface by excluding another interface's properties?
1
I wonder if it has any of the following features. I tried Google but I couldn't find it out. Thanks!
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Numbers - { number3 } = {
number: 1,
number2: 2
};
typescript
asked Apr 1 at 8:00
left click
26829
add a comment |
1
I wonder if it has any of the following features. I tried Google but I couldn't find it out. Thanks!
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Numbers - { number3 } = {
number: 1,
number2: 2
};
typescript
asked Apr 1 at 8:00
left click
26829
Have you read the documentation of TypeScript? It explains (with examples) what one can and cannot do with interfaces.
– axiac
Apr 1 at 8:04
@axiac Thanks! I've already read it before, but not entirely. and I've read the interface section once more according to your advice. :)
– left click
Apr 1 at 8:30
1
Based on the answer you get, it seems reading the release notes of each version is required to be up to date with the language: typescriptlang.org/docs/handbook/release-notes/…. I started reading them too.
– axiac
Apr 1 at 8:40
@axiac I appreciate your kindness.
– left click
Apr 1 at 8:55
add a comment |
1
1
1
I wonder if it has any of the following features. I tried Google but I couldn't find it out. Thanks!
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Numbers - { number3 } = {
number: 1,
number2: 2
};
typescript
asked Apr 1 at 8:00
left click
26829
I wonder if it has any of the following features. I tried Google but I couldn't find it out. Thanks!
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Numbers - { number3 } = {
number: 1,
number2: 2
};
typescript
typescript
asked Apr 1 at 8:00
left click
26829
asked Apr 1 at 8:00
left click
26829
asked Apr 1 at 8:00
left click
26829
asked Apr 1 at 8:00
left click
26829
asked Apr 1 at 8:00
left click
26829
26829
Have you read the documentation of TypeScript? It explains (with examples) what one can and cannot do with interfaces.
– axiac
Apr 1 at 8:04
@axiac Thanks! I've already read it before, but not entirely. and I've read the interface section once more according to your advice. :)
– left click
Apr 1 at 8:30
1
Based on the answer you get, it seems reading the release notes of each version is required to be up to date with the language: typescriptlang.org/docs/handbook/release-notes/…. I started reading them too.
– axiac
Apr 1 at 8:40
@axiac I appreciate your kindness.
– left click
Apr 1 at 8:55
add a comment |
Have you read the documentation of TypeScript? It explains (with examples) what one can and cannot do with interfaces.
– axiac
Apr 1 at 8:04
@axiac Thanks! I've already read it before, but not entirely. and I've read the interface section once more according to your advice. :)
– left click
Apr 1 at 8:30
1
Based on the answer you get, it seems reading the release notes of each version is required to be up to date with the language: typescriptlang.org/docs/handbook/release-notes/…. I started reading them too.
– axiac
Apr 1 at 8:40
@axiac I appreciate your kindness.
– left click
Apr 1 at 8:55
Have you read the documentation of TypeScript? It explains (with examples) what one can and cannot do with interfaces.
– axiac
Apr 1 at 8:04
Have you read the documentation of TypeScript? It explains (with examples) what one can and cannot do with interfaces.
– axiac
Apr 1 at 8:04
@axiac Thanks! I've already read it before, but not entirely. and I've read the interface section once more according to your advice. :)
– left click
Apr 1 at 8:30
@axiac Thanks! I've already read it before, but not entirely. and I've read the interface section once more according to your advice. :)
– left click
Apr 1 at 8:30
1
1
Based on the answer you get, it seems reading the release notes of each version is required to be up to date with the language: typescriptlang.org/docs/handbook/release-notes/…. I started reading them too.
– axiac
Apr 1 at 8:40
Based on the answer you get, it seems reading the release notes of each version is required to be up to date with the language: typescriptlang.org/docs/handbook/release-notes/…. I started reading them too.
– axiac
Apr 1 at 8:40
@axiac I appreciate your kindness.
– left click
Apr 1 at 8:55
@axiac I appreciate your kindness.
– left click
Apr 1 at 8:55
add a comment |
1 Answer
1
active
oldest
votes
4
You can do this in 2.8 using the new Exclude conditional type and the Pick mapped type
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Omit<Numbers, 'number3'> = {
number: 1,
number2: 2
};
Before 2.8 Omit could be defined like this:
type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];
type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
1
I was trying to figure out by Exclude was introduced in 2.8, but it did not work to me. Good solution. Thank you for teaching me. :)
– left click
Apr 1 at 8:37
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
4
You can do this in 2.8 using the new Exclude conditional type and the Pick mapped type
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Omit<Numbers, 'number3'> = {
number: 1,
number2: 2
};
Before 2.8 Omit could be defined like this:
type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];
type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
1
I was trying to figure out by Exclude was introduced in 2.8, but it did not work to me. Good solution. Thank you for teaching me. :)
– left click
Apr 1 at 8:37
add a comment |
4
You can do this in 2.8 using the new Exclude conditional type and the Pick mapped type
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Omit<Numbers, 'number3'> = {
number: 1,
number2: 2
};
Before 2.8 Omit could be defined like this:
type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];
type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
1
I was trying to figure out by Exclude was introduced in 2.8, but it did not work to me. Good solution. Thank you for teaching me. :)
– left click
Apr 1 at 8:37
add a comment |
4
4
4
You can do this in 2.8 using the new Exclude conditional type and the Pick mapped type
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Omit<Numbers, 'number3'> = {
number: 1,
number2: 2
};
Before 2.8 Omit could be defined like this:
type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];
type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
You can do this in 2.8 using the new Exclude conditional type and the Pick mapped type
type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
interface Numbers {
number: number;
number2: number;
number3: number;
}
const numbers:Omit<Numbers, 'number3'> = {
number: 1,
number2: 2
};
Before 2.8 Omit could be defined like this:
type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];
type Omit<T, K extends keyof T> = Pick<T, Diff<keyof T, K>>;
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
answered Apr 1 at 8:25
Titian Cernicova-Dragomir
56.2k33452
56.2k33452
1
I was trying to figure out by Exclude was introduced in 2.8, but it did not work to me. Good solution. Thank you for teaching me. :)
– left click
Apr 1 at 8:37
add a comment |
1
I was trying to figure out by Exclude was introduced in 2.8, but it did not work to me. Good solution. Thank you for teaching me. :)
– left click
Apr 1 at 8:37
1
1
I was trying to figure out by Exclude was introduced in 2.8, but it did not work to me. Good solution. Thank you for teaching me. :)
– left click
Apr 1 at 8:37
I was trying to figure out by Exclude was introduced in 2.8, but it did not work to me. Good solution. Thank you for teaching me. :)
– left click
Apr 1 at 8:37
add a comment |
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Have you read the documentation of TypeScript? It explains (with examples) what one can and cannot do with interfaces.
– axiac
Apr 1 at 8:04
@axiac Thanks! I've already read it before, but not entirely. and I've read the interface section once more according to your advice. :)
– left click
Apr 1 at 8:30
1
Based on the answer you get, it seems reading the release notes of each version is required to be up to date with the language: typescriptlang.org/docs/handbook/release-notes/…. I started reading them too.
– axiac
Apr 1 at 8:40
@axiac I appreciate your kindness.
– left click
Apr 1 at 8:55