Function cachedSetProperty

lib/util/cleverMerge.js:61–87

(obj, property, value)

 * @returns {T} new object
 */
const cachedSetProperty = (obj, property, value) => {
	let mapByProperty = setPropertyCache.get(obj);

	if (mapByProperty === undefined) {
		mapByProperty = new Map();
		setPropertyCache.set(obj, mapByProperty);
	}

	let mapByValue = mapByProperty.get(property);

	if (mapByValue === undefined) {
		mapByValue = new Map();
		mapByProperty.set(property, mapByValue);
	}

	let result = mapByValue.get(value);

	if (result) return /** @type {T} */ (result);

	result = {
		...obj,
		[property]: value
	};
	mapByValue.set(value, result);

	return /** @type {T} */ (result);
};

/**
 * Defines the by values type used by this module.