jiapengyu
44 lines
1.6 KiB
JavaScript
44 lines
1.6 KiB
JavaScript
import _curry2 from './internal/_curry2';
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import _map from './internal/_map';
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import curryN from './curryN';
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import max from './max';
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import pluck from './pluck';
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import reduce from './reduce';
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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. When invoked, this new function is applied to some
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* arguments, each branching function is applied to those same arguments. The
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* results of each branching function are passed as arguments to the converging
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* 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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* var 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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* var 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 = /*#__PURE__*/_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; |