44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
JavaScript
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import _includesWith from "./internal/_includesWith.js";
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import _curry3 from "./internal/_curry3.js";
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/**
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* Finds the set (i.e. no duplicates) of all elements in the first list not
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* contained in the second list. Duplication is determined according to the
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* value returned by applying the supplied predicate to two list elements.
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*
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* @func
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* @memberOf R
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* @since v0.1.0
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* @category Relation
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* @sig ((a, a) -> Boolean) -> [a] -> [a] -> [a]
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* @param {Function} pred A predicate used to test whether two items are equal.
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* @param {Array} list1 The first list.
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* @param {Array} list2 The second list.
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* @return {Array} The elements in `list1` that are not in `list2`.
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* @see R.difference, R.symmetricDifference, R.symmetricDifferenceWith
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* @example
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*
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* const cmp = (x, y) => x.a === y.a;
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* const l1 = [{a: 1}, {a: 2}, {a: 3}];
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* const l2 = [{a: 3}, {a: 4}];
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* R.differenceWith(cmp, l1, l2); //=> [{a: 1}, {a: 2}]
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*/
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var differenceWith =
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/*#__PURE__*/
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_curry3(function differenceWith(pred, first, second) {
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var out = [];
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var idx = 0;
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var firstLen = first.length;
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while (idx < firstLen) {
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if (!_includesWith(pred, first[idx], second) && !_includesWith(pred, first[idx], out)) {
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out.push(first[idx]);
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}
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idx += 1;
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}
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return out;
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});
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export default differenceWith;
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