48 lines
1.7 KiB
JavaScript
48 lines
1.7 KiB
JavaScript
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import _curry2 from "./internal/_curry2.js";
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import _map from "./internal/_map.js";
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import curryN from "./curryN.js";
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import max from "./max.js";
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import pluck from "./pluck.js";
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import reduce from "./reduce.js";
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/**
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* Accepts a converging function and a list of branching functions and returns
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* a new function. The arity of the new function is the same as the arity of
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* the longest branching function. When invoked, this new function is applied
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* to some arguments, and each branching function is applied to those same
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* arguments. The results of each branching function are passed as arguments
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* to the converging function to produce the return value.
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*
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* @func
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* @memberOf R
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* @since v0.4.2
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* @category Function
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* @sig ((x1, x2, ...) -> z) -> [((a, b, ...) -> x1), ((a, b, ...) -> x2), ...] -> (a -> b -> ... -> z)
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* @param {Function} after A function. `after` will be invoked with the return values of
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* `fn1` and `fn2` as its arguments.
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* @param {Array} functions A list of functions.
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* @return {Function} A new function.
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* @see R.useWith
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* @example
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*
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* const average = R.converge(R.divide, [R.sum, R.length])
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* average([1, 2, 3, 4, 5, 6, 7]) //=> 4
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*
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* const strangeConcat = R.converge(R.concat, [R.toUpper, R.toLower])
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* strangeConcat("Yodel") //=> "YODELyodel"
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*
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* @symb R.converge(f, [g, h])(a, b) = f(g(a, b), h(a, b))
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*/
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var converge =
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/*#__PURE__*/
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_curry2(function converge(after, fns) {
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return curryN(reduce(max, 0, pluck('length', fns)), function () {
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var args = arguments;
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var context = this;
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return after.apply(context, _map(function (fn) {
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return fn.apply(context, args);
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}, fns));
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});
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});
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export default converge;
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