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ts-cast

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Runtime typechecking

github.com/DScheglov/ts-cast

DScheglov/ts-cast

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import { predicateName } from './predicate'; export const toBe = (predicate, errorMessage = predicateName(predicate)) => (value) => (predicate(value) ? null : errorMessage); export const notToBe = (predicate, errorMessage = predicateName(predicate)) => (value) => (predicate(value) ? `not ${errorMessage}` : null);