1 | var _curry2 =
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2 | /*#__PURE__*/
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3 | require("./internal/_curry2");
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4 | /**
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5 | * Takes a list and a predicate and returns a pair of lists with the following properties:
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6 | *
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7 | * - the result of concatenating the two output lists is equivalent to the input list;
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8 | * - none of the elements of the first output list satisfies the predicate; and
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9 | * - if the second output list is non-empty, its first element satisfies the predicate.
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10 | *
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11 | * @func
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12 | * @memberOf R
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13 | * @since v0.19.0
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14 | * @category List
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15 | * @sig (a -> Boolean) -> [a] -> [[a], [a]]
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16 | * @param {Function} pred The predicate that determines where the array is split.
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17 | * @param {Array} list The array to be split.
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18 | * @return {Array}
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19 | * @example
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20 | *
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21 | * R.splitWhen(R.equals(2), [1, 2, 3, 1, 2, 3]); //=> [[1], [2, 3, 1, 2, 3]]
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22 | */
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23 |
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24 |
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25 | var splitWhen =
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26 | /*#__PURE__*/
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27 | _curry2(function splitWhen(pred, list) {
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28 | var idx = 0;
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29 | var len = list.length;
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30 | var prefix = [];
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31 |
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32 | while (idx < len && !pred(list[idx])) {
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33 | prefix.push(list[idx]);
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34 | idx += 1;
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35 | }
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36 |
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37 | return [prefix, Array.prototype.slice.call(list, idx)];
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38 | });
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39 |
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40 | module.exports = splitWhen; |
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