1 | var _curryN =
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2 | /*#__PURE__*/
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3 | require("./internal/_curryN");
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4 |
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5 | var _reduce =
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6 | /*#__PURE__*/
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7 | require("./internal/_reduce");
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8 |
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9 | var _reduced =
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10 | /*#__PURE__*/
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11 | require("./internal/_reduced");
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12 | /**
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13 | * Like [`reduce`](#reduce), `reduceWhile` returns a single item by iterating
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14 | * through the list, successively calling the iterator function. `reduceWhile`
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15 | * also takes a predicate that is evaluated before each step. If the predicate
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16 | * returns `false`, it "short-circuits" the iteration and returns the current
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17 | * value of the accumulator.
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18 | *
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19 | * @func
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20 | * @memberOf R
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21 | * @since v0.22.0
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22 | * @category List
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23 | * @sig ((a, b) -> Boolean) -> ((a, b) -> a) -> a -> [b] -> a
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24 | * @param {Function} pred The predicate. It is passed the accumulator and the
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25 | * current element.
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26 | * @param {Function} fn The iterator function. Receives two values, the
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27 | * accumulator and the current element.
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28 | * @param {*} a The accumulator value.
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29 | * @param {Array} list The list to iterate over.
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30 | * @return {*} The final, accumulated value.
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31 | * @see R.reduce, R.reduced
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32 | * @example
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33 | *
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34 | * const isOdd = (acc, x) => x % 2 === 1;
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35 | * const xs = [1, 3, 5, 60, 777, 800];
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36 | * R.reduceWhile(isOdd, R.add, 0, xs); //=> 9
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37 | *
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38 | * const ys = [2, 4, 6]
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39 | * R.reduceWhile(isOdd, R.add, 111, ys); //=> 111
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40 | */
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41 |
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42 |
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43 | var reduceWhile =
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44 | /*#__PURE__*/
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45 | _curryN(4, [], function _reduceWhile(pred, fn, a, list) {
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46 | return _reduce(function (acc, x) {
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47 | return pred(acc, x) ? fn(acc, x) : _reduced(acc);
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48 | }, a, list);
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49 | });
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50 |
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51 | module.exports = reduceWhile; |
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