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x/ramda/symmetricDifferenceWith.js

:ram: Practical functional Javascript
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import _curry3 from './internal/_curry3';import concat from './concat';import differenceWith from './differenceWith';

/** * Finds the set (i.e. no duplicates) of all elements contained in the first or * second list, but not both. Duplication is determined according to the value * returned by applying the supplied predicate to two list elements. * * @func * @memberOf R * @since v0.19.0 * @category Relation * @sig ((a, a) -> Boolean) -> [a] -> [a] -> [a] * @param {Function} pred A predicate used to test whether two items are equal. * @param {Array} list1 The first list. * @param {Array} list2 The second list. * @return {Array} The elements in `list1` or `list2`, but not both. * @see R.symmetricDifference, R.difference, R.differenceWith * @example * * const eqA = R.eqBy(R.prop('a')); * const l1 = [{a: 1}, {a: 2}, {a: 3}, {a: 4}]; * const l2 = [{a: 3}, {a: 4}, {a: 5}, {a: 6}]; * R.symmetricDifferenceWith(eqA, l1, l2); //=> [{a: 1}, {a: 2}, {a: 5}, {a: 6}] */var symmetricDifferenceWith = _curry3(function symmetricDifferenceWith(pred, list1, list2) { return concat(differenceWith(pred, list1, list2), differenceWith(pred, list2, list1));});export default symmetricDifferenceWith;