import deepmerge from "deepmerge";

const combineMerge = (target, source, options) => {
	const destination = target.slice();
  
	source.forEach((item: object, index: number) => {
		if (typeof destination[index] === 'undefined') {
		destination[index] = options.cloneUnlessOtherwiseSpecified(item, options);
		} else if (options.isMergeableObject(item)) {
		destination[index] = deepmerge(target[index], item, options);
		} else if (target.indexOf(item) === -1) {
		destination.push(item);
		}
	});
	return destination;
};

export default combineMerge;