class Utilities {
	constructor() {
	}

	getSpecific(key, idset, objectset) {
		var objIndex = 0;
		var objOffsetCounter = 0;
		if(key.indexOf(".") != -1) {
			var counterString = key.split(".");
			objIndex = parseInt(counterString[0]) - 1;
			key = counterString[1];
		}
		objOffsetCounter = objIndex;
		if(idset == null) {
			return null;
		}
		for(var index in idset) {
			var objId = idset[index];
			if(objId == null) {
				continue;
			}
			var otherItem = objectset[idset[index]];
			if(otherItem.keywords.indexOf(key) != -1 && objOffsetCounter-- == 0) {
				return otherItem;
			}
		}
	}
}
module.exports = new Utilities();