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17 lines
443 B
TypeScript
17 lines
443 B
TypeScript
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/**
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* Negates a boolean function
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* @param {(arg: T) => boolean} fn the boolean function to negate
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* @return {(arg: T) => boolean} curried function that will receive the arg to the boolean function
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*/
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const not = <T>(fn: (arg: T) => boolean) => (arg: T) => !fn(arg);
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/**
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* Identity function, immediately returns its argument
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* @template T
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* @param {T} x
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* @return {T}
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*/
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const identity = <T>(x: T): T => x;
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export { not, identity };
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