45 lines
1.3 KiB
JavaScript
45 lines
1.3 KiB
JavaScript
import composeK from "./composeK.js";
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import reverse from "./reverse.js";
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/**
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* Returns the left-to-right Kleisli composition of the provided functions,
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* each of which must return a value of a type supported by [`chain`](#chain).
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*
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* `R.pipeK(f, g, h)` is equivalent to `R.pipe(f, R.chain(g), R.chain(h))`.
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*
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* @func
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* @memberOf R
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* @since v0.16.0
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* @category Function
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* @sig Chain m => ((a -> m b), (b -> m c), ..., (y -> m z)) -> (a -> m z)
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* @param {...Function}
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* @return {Function}
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* @see R.composeK
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* @deprecated since v0.26.0
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* @example
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*
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* // parseJson :: String -> Maybe *
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* // get :: String -> Object -> Maybe *
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*
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* // getStateCode :: Maybe String -> Maybe String
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* const getStateCode = R.pipeK(
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* parseJson,
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* get('user'),
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* get('address'),
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* get('state'),
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* R.compose(Maybe.of, R.toUpper)
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* );
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*
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* getStateCode('{"user":{"address":{"state":"ny"}}}');
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* //=> Just('NY')
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* getStateCode('[Invalid JSON]');
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* //=> Nothing()
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* @symb R.pipeK(f, g, h)(a) = R.chain(h, R.chain(g, f(a)))
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*/
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export default function pipeK() {
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if (arguments.length === 0) {
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throw new Error('pipeK requires at least one argument');
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}
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return composeK.apply(this, reverse(arguments));
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} |