Compose 2 JS objects

compose.js

/* @flow */
const compose = (...objects: *) =>
    objects.reduce((merged, current) => {
        Object.keys(current).forEach(methodKey => {
            if (typeof current[methodKey] === 'function' && merged[methodKey]) {
                const mergedMethod = merged[methodKey];
                // eslint-disable-next-line no-param-reassign
                merged[methodKey] = (...args) => {
                    const mergedResult = mergedMethod(...args);
                    const currentResult = current[methodKey](...args);
                    return mergedResult || currentResult;
                };
            } else {
                merged[methodKey] = current[methodKey]; // eslint-disable-line no-param-reassign
            }
        });
        return merged;
    });

export default compose;