Using multiple filter fields and filter data with REST

multiple_filter_criterias.js

var params = {};
var filter = {};

params['filterField'] = "field1,field2";
params['filterData'] = "2,3;abc,cde";

if(params.hasOwnProperty('filterField') && params.hasOwnProperty('filterData')){

	var filterFieldArr = params.filterField.split(',');
	var filterDataArr = params.filterData.split(';');

	if(filterFieldArr.length == filterDataArr.length){
		for(var i=0; i<filterFieldArr.length; i++){
			filter[filterFieldArr[i]] = {};

			if(filterDataArr[i].indexOf(',') > -1){ // has multiple data for one field.
				var itm = filterDataArr[i].split(",");

				if(filterFieldArr[i] == "field1"){ // special treatment
					filter[filterFieldArr[i]] = {'$lte': itm[0], '$gte': itm[1]}
				}else{
					filter[filterFieldArr[i]] = {'$in': itm}
				}

			}else{
				filter[filterFieldArr[i]] = filterData[i];
			}
		}
	}

}

console.log(filter);