@jasmith79/sequable/dist/esm/filter.mjs

Library functions for working with generators

import { toIterator } from "./sequable.mjs";
/**
 * Filters the items of the given Iterator, Iterable, or generator function
 * using the supplied predicate function.
 *
 * @param pred The predicate function.
 * @param sequable The Iterator, Iterable, or generator function sequence
 * to filter.
 */
export function* filter(pred, seq) {
    const iter = toIterator(seq);
    let { value, done } = iter.next();
    while (!done) {
        if (pred(value)) {
            yield value;
        }
        ({ value, done } = iter.next());
    }
    if (value !== undefined && pred(value))
        return value;
}