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40 lines
1.1 KiB
TypeScript
40 lines
1.1 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/intersection.js
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import _includes from './internal/_includes.js';
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import _curry2 from './internal/_curry2.js';
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import _filter from './internal/_filter.js';
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import flip from './flip.js';
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import uniq from './uniq.js';
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/**
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* Combines two lists into a set (i.e. no duplicates) composed of those
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* elements common to both lists.
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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 [*] -> [*] -> [*]
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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 list of elements found in both `list1` and `list2`.
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* @see R.innerJoin
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* @example
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*
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* R.intersection([1,2,3,4], [7,6,5,4,3]); //=> [4, 3]
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*/
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var intersection = _curry2(function intersection(list1, list2) {
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var lookupList, filteredList;
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if (list1.length > list2.length) {
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lookupList = list1;
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filteredList = list2;
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} else {
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lookupList = list2;
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filteredList = list1;
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}
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return uniq(_filter(flip(_includes)(lookupList), filteredList));
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});
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export default intersection;
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