foop/src/deps/loop/reduce/reduceWhile.js

interfaces that describe their intentions.

// var curry = require('../fp/curry')
// var _reduce = require('./internal/_reduce')
// var _reduced = require('./internal/_reduced')
//
//
// /**
//  * Like [`reduce`](#reduce), `reduceWhile` returns a single item by iterating
//  * through the list, successively calling the iterator function. `reduceWhile`
//  * also takes a predicate that is evaluated before each step. If the predicate
//  * returns `false`, it "short-circuits" the iteration and returns the current
//  * value of the accumulator.
//  *
//  * @func
//  * @memberOf R
//  * @since v0.22.0
//  * @category List
//  * @sig ((a, b) -> Boolean) -> ((a, b) -> a) -> a -> [b] -> a
//  * @param {Function} pred The predicate. It is passed the accumulator and the
//  *        current element.
//  * @param {Function} fn The iterator function. Receives two values, the
//  *        accumulator and the current element.
//  * @param {*} a The accumulator value.
//  * @param {Array} list The list to iterate over.
//  * @return {*} The final, accumulated value.
//  * @see R.reduce, R.reduced
//  * @example
//  *
//  *      var isOdd = (acc, x) => x % 2 === 1;
//  *      var xs = [1, 3, 5, 60, 777, 800];
//  *      R.reduceWhile(isOdd, R.add, 0, xs); //=> 9
//  *
//  *      var ys = [2, 4, 6]
//  *      R.reduceWhile(isOdd, R.add, 111, ys); //=> 111
//  */
// module.exports = curry(4, [], function _reduceWhile(pred, fn, a, list) {
//   return _reduce(function(acc, x) {
//     return pred(acc, x) ? fn(acc, x) : _reduced(acc)
//   }, a, list)
// })