custom indexer

gistfile1.m

-(NSArray*)valuesForRevision:(CDTDocumentRevision*)revision
                   indexName:(NSString*)indexName
{
    
    NSMutableArray *returnArray = [NSMutableArray array];
    NSArray *arr = [[revision body] valueForKey:@"subjects"];
    for (NSDictionary *dict in arr) {
        [returnArray addObject:[dict valueForKey:@"mark"]];
    }
    
    return arr;
}