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48 lines
1.6 KiB
TypeScript
48 lines
1.6 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/innerJoin.js
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import _includesWith from './internal/_includesWith.js';
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import _curry3 from './internal/_curry3.js';
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import _filter from './internal/_filter.js';
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/**
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* Takes a predicate `pred`, a list `xs`, and a list `ys`, and returns a list
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* `xs'` comprising each of the elements of `xs` which is equal to one or more
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* elements of `ys` according to `pred`.
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*
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* `pred` must be a binary function expecting an element from each list.
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*
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* `xs`, `ys`, and `xs'` are treated as sets, semantically, so ordering should
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* not be significant, but since `xs'` is ordered the implementation guarantees
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* that its values are in the same order as they appear in `xs`. Duplicates are
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* not removed, so `xs'` may contain duplicates if `xs` contains duplicates.
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*
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* @func
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* @memberOf R
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* @since v0.24.0
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* @category Relation
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* @sig ((a, b) -> Boolean) -> [a] -> [b] -> [a]
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* @param {Function} pred
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* @param {Array} xs
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* @param {Array} ys
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* @return {Array}
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* @see R.intersection
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* @example
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*
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* R.innerJoin(
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* (record, id) => record.id === id,
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* [{id: 824, name: 'Richie Furay'},
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* {id: 956, name: 'Dewey Martin'},
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* {id: 313, name: 'Bruce Palmer'},
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* {id: 456, name: 'Stephen Stills'},
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* {id: 177, name: 'Neil Young'}],
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* [177, 456, 999]
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* );
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* //=> [{id: 456, name: 'Stephen Stills'}, {id: 177, name: 'Neil Young'}]
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*/
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var innerJoin = _curry3(function innerJoin(pred, xs, ys) {
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return _filter(function(x) { return _includesWith(pred, x, ys); }, xs);
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});
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export default innerJoin;
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