jiapengyu
35 lines
986 B
JavaScript
35 lines
986 B
JavaScript
var _arity = /*#__PURE__*/require('./internal/_arity');
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var _pipeP = /*#__PURE__*/require('./internal/_pipeP');
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var reduce = /*#__PURE__*/require('./reduce');
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var tail = /*#__PURE__*/require('./tail');
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/**
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* Performs left-to-right composition of one or more Promise-returning
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* functions. The leftmost function may have any arity; the remaining functions
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* must be unary.
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*
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* @func
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* @memberOf R
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* @since v0.10.0
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* @category Function
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* @sig ((a -> Promise b), (b -> Promise c), ..., (y -> Promise z)) -> (a -> Promise z)
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* @param {...Function} functions
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* @return {Function}
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* @see R.composeP
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* @example
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*
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* // followersForUser :: String -> Promise [User]
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* var followersForUser = R.pipeP(db.getUserById, db.getFollowers);
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*/
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function pipeP() {
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if (arguments.length === 0) {
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throw new Error('pipeP requires at least one argument');
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}
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return _arity(arguments[0].length, reduce(_pipeP, arguments[0], tail(arguments)));
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}
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module.exports = pipeP; |