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x/ramda/source/andThen.js

:ram: Practical functional Javascript
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import _curry2 from './internal/_curry2.js';import _assertPromise from './internal/_assertPromise.js';

/** * Returns the result of applying the onSuccess function to the value inside * a successfully resolved promise. This is useful for working with promises * inside function compositions. * * @func * @memberOf R * @since v0.27.1 * @category Function * @sig (a -> b) -> (Promise e a) -> (Promise e b) * @sig (a -> (Promise e b)) -> (Promise e a) -> (Promise e b) * @param {Function} onSuccess The function to apply. Can return a value or a promise of a value. * @param {Promise} p * @return {Promise} The result of calling `p.then(onSuccess)` * @see R.otherwise * @example * * const makeQuery = email => ({ query: { email }}); * const fetchMember = request => * Promise.resolve({ firstName: 'Bob', lastName: 'Loblaw', id: 42 }); * * //getMemberName :: String -> Promise ({ firstName, lastName }) * const getMemberName = R.pipe( * makeQuery, * fetchMember, * R.andThen(R.pick(['firstName', 'lastName'])) * ); * * getMemberName('bob@gmail.com').then(console.log); */var andThen = _curry2(function andThen(f, p) { _assertPromise('andThen', p);
return p.then(f);});export default andThen;