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55 lines
1.6 KiB
TypeScript
55 lines
1.6 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/pipeWith.js
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import _arity from './internal/_arity.js';
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import _curry2 from './internal/_curry2.js';
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import head from './head.js';
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import _reduce from './internal/_reduce.js';
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import tail from './tail.js';
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import identity from './identity.js';
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/**
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* Performs left-to-right function composition using transforming function. The first function may have
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* any arity; the remaining functions must be unary.
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*
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* **Note:** The result of pipeWith is not automatically curried. Transforming function is not used on the
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* first argument.
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*
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* @func
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* @memberOf R
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* @since v0.26.0
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* @category Function
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* @sig ((* -> *), [((a, b, ..., n) -> o), (o -> p), ..., (x -> y), (y -> z)]) -> ((a, b, ..., n) -> z)
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* @param {Function} transformer The transforming function
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* @param {Array} functions The functions to pipe
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* @return {Function}
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* @see R.composeWith, R.pipe
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* @example
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*
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* const pipeWhileNotNil = R.pipeWith((f, res) => R.isNil(res) ? res : f(res));
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* const f = pipeWhileNotNil([Math.pow, R.negate, R.inc])
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*
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* f(3, 4); // -(3^4) + 1
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* @symb R.pipeWith(f)([g, h, i])(...args) = f(i, f(h, g(...args)))
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*/
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var pipeWith = _curry2(function pipeWith(xf, list) {
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if (list.length <= 0) {
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return identity;
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}
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var headList = head(list);
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var tailList = tail(list);
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return _arity(headList.length, function() {
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return _reduce(
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function(result, f) {
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return xf.call(this, f, result);
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},
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headList.apply(this, arguments),
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tailList
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);
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});
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});
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export default pipeWith;
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