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on this file since 65b6638 was d24f17c, checked in by Aleksandar Panovski <apano77@…>, 15 months ago |
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[d24f17c] | 1 | var _curry2 =
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| 2 | /*#__PURE__*/
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| 3 | require("./internal/_curry2.js");
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| 4 |
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| 5 | var _dispatchable =
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| 6 | /*#__PURE__*/
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| 7 | require("./internal/_dispatchable.js");
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| 8 |
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| 9 | var _xfindLast =
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| 10 | /*#__PURE__*/
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| 11 | require("./internal/_xfindLast.js");
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| 12 | /**
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| 13 | * Returns the last element of the list which matches the predicate, or
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| 14 | * `undefined` if no element matches.
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| 15 | *
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| 16 | * Acts as a transducer if a transformer is given in list position.
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| 17 | *
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| 18 | * @func
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| 19 | * @memberOf R
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| 20 | * @since v0.1.1
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| 21 | * @category List
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| 22 | * @sig (a -> Boolean) -> [a] -> a | undefined
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| 23 | * @param {Function} fn The predicate function used to determine if the element is the
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| 24 | * desired one.
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| 25 | * @param {Array} list The array to consider.
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| 26 | * @return {Object} The element found, or `undefined`.
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| 27 | * @see R.transduce
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| 28 | * @example
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| 29 | *
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| 30 | * const xs = [{a: 1, b: 0}, {a:1, b: 1}];
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| 31 | * R.findLast(R.propEq(1, 'a'))(xs); //=> {a: 1, b: 1}
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| 32 | * R.findLast(R.propEq(4, 'a'))(xs); //=> undefined
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| 33 | */
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| 34 |
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| 35 |
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| 36 | var findLast =
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| 37 | /*#__PURE__*/
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| 38 | _curry2(
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| 39 | /*#__PURE__*/
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| 40 | _dispatchable([], _xfindLast, function findLast(fn, list) {
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| 41 | var idx = list.length - 1;
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| 42 |
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| 43 | while (idx >= 0) {
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| 44 | if (fn(list[idx])) {
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| 45 | return list[idx];
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| 46 | }
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| 47 |
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| 48 | idx -= 1;
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| 49 | }
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| 50 | }));
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| 51 |
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| 52 | module.exports = findLast; |
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