map-fns/partialMap/index.esm.js

<h1 align="center"> <code>map-fns</code> </h1>

/**
 * Creates a new map populated with every key in `keys` where the value
 * behind each `k` in `keys` is `map[k]`.
 *
 * ```tsx
 * partialMap({ a: 1, b: 2, c: 3 }, ["a", "c"]);
 * //=> {
 * //     a: 1,
 * //     c: 3,
 * //   }
 * ```
 *
 * @param map The original map.
 * @param keys The keys to include in the new map.
 * @returns a new `map` populated with every key in `keys` where the value
 * behind each `k` in `keys` is `map[k]`.
 */
function partialMap(map, keys) {
    var obj = {};
    for (var _i = 0, keys_1 = keys; _i < keys_1.length; _i++) {
        var key = keys_1[_i];
        if (!map.hasOwnProperty(key)) {
            throw new Error("Key '".concat(key, "' does not exist in map."));
        }
        obj[key] = map[key];
    }
    return obj;
}

export { partialMap as default };