thi-ng/umbrella

import type { Keys } from "@thi.ng/api";
import { isSet } from "@thi.ng/checks/is-set";
import { empty } from "./empty.js";

const __ensureSet = <T>(x: Iterable<T>) =>
    isSet(x) ? <Set<T>>x : new Set<T>(x);

export const withoutKeysMap = <K, V>(src: Map<K, V>, keys: Iterable<K>) => {
    const ks = __ensureSet(keys);
    const dest = empty(src, Map);
    for (let p of src.entries()) {
        const k = p[0];
        !ks.has(k) && dest.set(k, p[1]);
    }
    return dest;
};

export const withoutKeysObj = <T extends object>(
    src: T,
    keys: Iterable<Keys<T>>
) => {
    const ks = __ensureSet(keys);
    const dest: Partial<T> = {};
    for (let k in src) {
        src.hasOwnProperty(k) &&
            !ks.has(<Keys<T>>k) &&
            (dest[<Keys<T>>k] = src[<Keys<T>>k]);
    }
    return dest;
};