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18 lines
287 B
TypeScript
18 lines
287 B
TypeScript
interface Result<T = unknown> {
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res: T;
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}
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export function memoize<T = unknown>(callback: () => T): () => T {
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let memo: null | Result<T> = null;
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return (): T => {
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if (memo) {
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return memo.res;
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}
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const res = callback();
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memo = { res };
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return res;
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};
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}
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