Update typescript.md #1863
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Update typescript.md #1863
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Good work |
lmarvaud
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Oct 21, 2022
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lmarvaud
approved these changes
Oct 25, 2022
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| ```ts | ||
| type GetReturnType<T> = T extends (...args: unknown[]) => infer R | ||
| ? R | ||
| : never; | ||
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| type Num = GetReturnType<() => number>; // number | ||
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| type First<T extends Array<any>> = T extends [infer F, ...infer Rest] ? F : never; | ||
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| type Str = First<['hello', 1, false]>; // 'hello' | ||
| ``` |
There was a problem hiding this comment.
those are two different examples. You may split those.
type GetReturnType<T> = T extends (...args: unknown[]) => infer R
? R
: never;
type Num = GetReturnType<() => number>; // numbertype First<T extends Array<any>> = T extends [infer F, ...infer Rest] ? F : never;
type Str = First<['hello', 1, false]>; // 'hello'There was a problem hiding this comment.
Thanks.
I fixed it.
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This PR updates typescript.md to Adds a few extra hints.