@typed/fp/esm/internal.js

Data Structures and Resources for fp-ts

/**
 * @typed/fp/internal is a place for shared code that doesn't belong in the public API
 * @internal
 * @since 0.9.2
 */
import * as E from 'fp-ts/Either';
/**
 * Helpful for creatin ChainRec instances for Either-based types.
 * @internal
 * @since 0.9.2
 * @category Combinator
 */
export const swapEithers = (either) => {
    if (E.isLeft(either)) {
        return E.right(either);
    }
    const e = either.right;
    if (E.isLeft(e)) {
        return e;
    }
    return E.right(e);
};
export function memoize(f) {
    const cache = new Map();
    return (a) => {
        if (!cache.has(a)) {
            const b = f(a);
            cache.set(a, b);
            return b;
        }
        return cache.get(a);
    };
}
//# sourceMappingURL=internal.js.map