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36 lines
1.2 KiB
TypeScript
36 lines
1.2 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/unionWith.js
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import _concat from './internal/_concat.js';
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import _curry3 from './internal/_curry3.js';
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import uniqWith from './uniqWith.js';
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/**
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* Combines two lists into a set (i.e. no duplicates) composed of the elements
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* of each list. Duplication is determined according to the value returned by
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* applying the supplied predicate to two list elements. If an element exists
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* in both lists, the first element from the first list will be used.
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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) -> [*] -> [*] -> [*]
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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 first and second lists concatenated, with
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* duplicates removed.
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* @see R.union
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* @example
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*
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* const l1 = [{a: 1}, {a: 2}];
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* const l2 = [{a: 1}, {a: 4}];
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* R.unionWith(R.eqBy(R.prop('a')), l1, l2); //=> [{a: 1}, {a: 2}, {a: 4}]
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*/
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var unionWith = _curry3(function unionWith(pred, list1, list2) {
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return uniqWith(pred, _concat(list1, list2));
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});
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export default unionWith;
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