@lou.codes/iterables/dist/filter.js

🔁 Iterable and AsyncIterable utils

import { createIterableIterator } from "./createIterableIterator.js";
/**
 * Filters items in an iterable against a predicate and returns items that
 * evaluated to `true`.
 *
 * @category Generators
 * @example
 * ```typescript
 * const filterEven = filter((number: number) => number % 2 === 0);
 *
 * iterableToArray(filterEven([1, 2, 3, 4])); // [2, 4]
 * iterableToArray(filterEven([1, 3, 5, 7])); // []
 * ```
 * @param predicate Predicate function to evaluate each item.
 * @returns Curried function with `predicate` set in context.
 */
export const filter = predicate => iterable =>
	createIterableIterator(function* () {
		// eslint-disable-next-line functional/no-loop-statements
		for (const item of iterable) {
			// eslint-disable-next-line functional/no-conditional-statements
			if (predicate(item)) {
				yield item;
			}
		}
	});