@zkochan/pnpm
Version:
Fast, disk space efficient package manager
29 lines (28 loc) • 908 B
JavaScript
import _arity from './internal/_arity';
import _pipeP from './internal/_pipeP';
import reduce from './reduce';
import tail from './tail';
/**
* Performs left-to-right composition of one or more Promise-returning
* functions. The leftmost function may have any arity; the remaining functions
* must be unary.
*
* @func
* @memberOf R
* @since v0.10.0
* @category Function
* @sig ((a -> Promise b), (b -> Promise c), ..., (y -> Promise z)) -> (a -> Promise z)
* @param {...Function} functions
* @return {Function}
* @see R.composeP
* @example
*
* // followersForUser :: String -> Promise [User]
* var followersForUser = R.pipeP(db.getUserById, db.getFollowers);
*/
export default function pipeP() {
if (arguments.length === 0) {
throw new Error('pipeP requires at least one argument');
}
return _arity(arguments[0].length, reduce(_pipeP, arguments[0], tail(arguments)));
}