在我的应用程序中,我有一个包含两个数组的字典,例如:NSDictionary*d=[[NSDictionaryalloc]initWithObjectsAndKeys:listOfEvents,@"l",arr_distance,@"d",nil];NSLog(@"%@",d);d=("353.90","354.68","350.42","1.18");l=({Contestant1="Jonjones";Contestant2="Andersonsilva";},{Contestant1="Jonjones";Contestant2="Andersonsilva";},{Contes
下面是一个mapreduce程序,在map函数中进行过滤,在reduce步骤中进行求和。map部分执行良好。但是当reduce部分运行时,它会卡在context.write(key,value)行。只有当我尝试在reduce函数类型中编写与在map函数中编写的不同的输出时,才会发生这种情况publicclassFilter3{publicstaticclassTokenizerMapperextendsMapper{publicvoidmap(Objectkey,Textvalue,Contextcontext)throwsIOException,InterruptedExceptio