@aws/pdk
Version:
All documentation is located at: https://aws.github.io/aws-pdk
51 lines (48 loc) • 1.56 kB
JavaScript
import _curry2 from "./internal/_curry2.js";
import _dispatchable from "./internal/_dispatchable.js";
import _filter from "./internal/_filter.js";
import _isObject from "./internal/_isObject.js";
import _reduce from "./internal/_reduce.js";
import _xfilter from "./internal/_xfilter.js";
import keys from "./keys.js";
/**
* Takes a predicate and a `Filterable`, and returns a new filterable of the
* same type containing the members of the given filterable which satisfy the
* given predicate. Filterable objects include plain objects or any object
* that has a filter method such as `Array`.
*
* Dispatches to the `filter` method of the second argument, if present.
*
* Acts as a transducer if a transformer is given in list position.
*
* @func
* @memberOf R
* @since v0.1.0
* @category List
* @sig Filterable f => (a -> Boolean) -> f a -> f a
* @param {Function} pred
* @param {Array} filterable
* @return {Array} Filterable
* @see R.reject, R.transduce, R.addIndex
* @example
*
* const isEven = n => n % 2 === 0;
*
* R.filter(isEven, [1, 2, 3, 4]); //=> [2, 4]
*
* R.filter(isEven, {a: 1, b: 2, c: 3, d: 4}); //=> {b: 2, d: 4}
*/
var filter =
/*#__PURE__*/
_curry2(
/*#__PURE__*/
_dispatchable(['fantasy-land/filter', 'filter'], _xfilter, function (pred, filterable) {
return _isObject(filterable) ? _reduce(function (acc, key) {
if (pred(filterable[key])) {
acc[key] = filterable[key];
}
return acc;
}, {}, keys(filterable)) : // else
_filter(pred, filterable);
}));
export default filter;