Custom filter in angularjs

In the below code we have seen how to paginate the table and here we will see custom filter
Custom filter is used to filter each values.

<tr dir-paginate="record in records | orderBy:sortType:sortReverse  | filter: 'myFilter' |itemsPerPage:5"></tr>
 app.filter('myFilter', function ($filter) {
            return function (results, filters) {
                if (filters == null) {
                    return results;
                }
                var filteredData;
                filteredData = $filter('filter')(results, function (record) {
                    var matchId = false, matchName = false, matchCountry = false, matchSalary = false, matchAge = false;

                    if (filters.Id != null && filters.Id.length > 0) { matchId = record.Id == filters.Id; } else { matchId = true; }
                    if (filters.Name != null && filters.Name.length > 0) { matchName = record.Name.toUpperCase().indexOf(filters.Name.toUpperCase()) > -1; } else { matchName = true; }
                    if (filters.Country != null && filters.Country.length > 0) { matchCountry = record.Country.toString().toUpperCase().indexOf(filters.Country.toString().toUpperCase()) > -1; } else { matchCountry = true; }
                    //if(filters.caseId != null && filters.caseId.length > 0){ matchCaseId = patient.caseId==filters.caseId;}else{ matchCaseId = true; }
                    if (filters.Salary != null && filters.Salary.length > 0) { matchSalary = record.Salary.toUpperCase().indexOf(filters.Salary.toUpperCase()) > -1; } else { matchSalary = true; }
                    if (filters.Age != null && filters.Age.length > 0) { matchAge = record.Age == filters.Age; } else { matchAge = true; }

                    return matchId && matchName && matchCountry && matchSalary && matchAge;
                });
                return filteredData;
            };
        });