updateDescriptors with $watch (better do it with back-end)

updateDescriptors.js

//	$scope.$watch('settingsTogo.advancedSettings.length', function(){
	$scope.updateDescriptors =  function(){
		var ace=$scope.settingsTogo.advancedSettings;
		var raw_odList=ace.slice(ace.lastIndexOf('>')+1).split('[\'');//console.log(raw_odList);
		var orDescriptorsTemp=[];
		var orDscMsgsTemp=[];
		_.each(raw_odList,function(rod, idx, list){
			// each rod if no ']' return else good push it to orDescriptors
			if(rod.length<5||rod.indexOf(']')==-1) return;
			//eval od to array=['name',[1,2,3]]
			var od2='[\''+rod.replace('(','[');
			var od=eval(od2.replace(')',']'));//console.log(od);
			// if od format is correct
			if(_.isString(od[0])&& _.isArray(od[1])) {
				var idxOfName=_.indexOf($scope.attNameList,od[0]);

				if(idxOfName!=-1){ //console.log(od[1]);
					var attValueList=_.map(od[1],function(k){

						//todo: if no "k<=", undefined[0] would be an error, instead of undefined
						if(_.isNumber(k)){
							if(k>=$scope.AT[idxOfName].length) {
								orDscMsgsTemp.push(od[1]+'Invalid ');
								return;
							} else {
								return $scope.AT[idxOfName][k][0];
							}
						}

						if(_.isString(k)) {
							var tempATC= _.map($scope.AT[idxOfName],function(rC){return rC[0];});
							return tempATC[_.indexOf(tempATC,k)];
						} else{ // not Number not String
							orDscMsgsTemp.push(od[1]+'Invalid ');
						}

					});

					// value from isString could be undefined
					if(_.all(attValueList)) {
						orDescriptorsTemp.push([od[0],attValueList])
					} else{// some k mismatch
						orDscMsgsTemp.push(od[1]+'Invalid ');
					}


				} else {//idxOfName==-1, AttributeName mismatch
					orDscMsgsTemp.push(od[0]+' is not a valid attribute name.');
				}


			} else { //od format is not correct
				orDscMsgsTemp.push('['+od+'] is Not good enough.')
			}
		});
		//eof: each rod
		$scope.settingsTogo.orDescriptors=orDescriptorsTemp;
		$scope.settingsTogo.orDscMsgs=orDscMsgsTemp;
		//console.log(orDescriptorsTemp);
		//console.log(orDscMsgsTemp);
	};