11 lines
424 B
TypeScript
11 lines
424 B
TypeScript
type Diff<T extends keyof any, U extends keyof any> =
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({ [P in T]: P } & { [P in U]: never } & { [x: string]: never })[T]
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type Omit<U, K extends keyof U> = Pick<U, Diff<keyof U, K>>
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type Omit1<U, K extends keyof U> = Pick<U, Diff<keyof U, K>>;
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// is in fact an equivalent of
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type Omit2<T, K extends keyof T> = {[P in Diff<keyof T, K>]: T[P]};
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type O = Omit<{ a: number, b: string }, 'a'>
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export const o: O = { b: '' }
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