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54 lines
1.6 KiB
TypeScript
54 lines
1.6 KiB
TypeScript
// Loaded from https://deno.land/x/ramda@v0.27.2/source/filter.js
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import _curry2 from './internal/_curry2.js';
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import _dispatchable from './internal/_dispatchable.js';
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import _filter from './internal/_filter.js';
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import _isObject from './internal/_isObject.js';
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import _reduce from './internal/_reduce.js';
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import _xfilter from './internal/_xfilter.js';
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import keys from './keys.js';
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/**
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* Takes a predicate and a `Filterable`, and returns a new filterable of the
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* same type containing the members of the given filterable which satisfy the
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* given predicate. Filterable objects include plain objects or any object
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* that has a filter method such as `Array`.
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*
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* Dispatches to the `filter` method of the second argument, if present.
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*
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* Acts as a transducer if a transformer is given in list position.
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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 List
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* @sig Filterable f => (a -> Boolean) -> f a -> f a
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* @param {Function} pred
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* @param {Array} filterable
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* @return {Array} Filterable
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* @see R.reject, R.transduce, R.addIndex
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* @example
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*
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* const isEven = n => n % 2 === 0;
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*
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* R.filter(isEven, [1, 2, 3, 4]); //=> [2, 4]
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*
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* R.filter(isEven, {a: 1, b: 2, c: 3, d: 4}); //=> {b: 2, d: 4}
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*/
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var filter = _curry2(_dispatchable(['fantasy-land/filter', 'filter'], _xfilter, function(pred, filterable) {
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return (
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_isObject(filterable) ?
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_reduce(function(acc, key) {
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if (pred(filterable[key])) {
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acc[key] = filterable[key];
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}
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return acc;
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}, {}, keys(filterable)) :
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// else
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_filter(pred, filterable)
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);
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}));
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export default filter;
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