1 | var _Set =
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2 | /*#__PURE__*/
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3 | require("./internal/_Set");
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4 |
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5 | var _curry2 =
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6 | /*#__PURE__*/
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7 | require("./internal/_curry2");
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8 | /**
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9 | * Returns a new list containing only one copy of each element in the original
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10 | * list, based upon the value returned by applying the supplied function to
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11 | * each list element. Prefers the first item if the supplied function produces
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12 | * the same value on two items. [`R.equals`](#equals) is used for comparison.
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13 | *
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14 | * @func
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15 | * @memberOf R
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16 | * @since v0.16.0
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17 | * @category List
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18 | * @sig (a -> b) -> [a] -> [a]
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19 | * @param {Function} fn A function used to produce a value to use during comparisons.
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20 | * @param {Array} list The array to consider.
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21 | * @return {Array} The list of unique items.
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22 | * @example
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23 | *
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24 | * R.uniqBy(Math.abs, [-1, -5, 2, 10, 1, 2]); //=> [-1, -5, 2, 10]
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25 | */
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26 |
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27 |
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28 | var uniqBy =
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29 | /*#__PURE__*/
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30 | _curry2(function uniqBy(fn, list) {
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31 | var set = new _Set();
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32 | var result = [];
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33 | var idx = 0;
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34 | var appliedItem, item;
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35 |
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36 | while (idx < list.length) {
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37 | item = list[idx];
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38 | appliedItem = fn(item);
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39 |
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40 | if (set.add(appliedItem)) {
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41 | result.push(item);
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42 | }
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43 |
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44 | idx += 1;
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45 | }
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46 |
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47 | return result;
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48 | });
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49 |
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50 | module.exports = uniqBy; |
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