结合NSMutableSets的问题

Question

我有以下代码:

   NSMutableSet* localSet = [[NSMutableSet alloc] initWithArray:symbols];
NSMutableArray* fetchedSymbolsArray = [NSMutableArray array];

for (NSDictionary* symbol in fetchedSymbols) {
    [fetchedSymbolsArray addObject:[NSDictionary dictionaryWithObject:[symbol valueForKey:@"symbol"] forKey:@"symbol"]];
}

NSMutableSet* serverSet = [[NSMutableSet alloc] initWithArray:fetchedSymbolsArray];

[localSet unionSet:serverSet];

for (NSDictionary* symbol in localSet) {
    NSLog(@"%@",[symbol valueForKey:@"symbol"]);
}

我希望serverSet中的所有内容都在localSet中.此代码不反映这一点.

如果没有将任何重复项添加到localSet也是更可取的.

编辑:这是我的日志:

2011-08-16 17:46:28.887 Stream[94612:207] YHOO
2011-08-16 17:46:28.887 Stream[94612:207] GOOG
2011-08-16 17:46:28.887 Stream[94612:207] INTC
2011-08-16 17:46:28.888 Stream[94612:207] BIDU
2011-08-16 17:46:28.888 Stream[94612:207] INTC
2011-08-16 17:46:28.888 Stream[94612:207] BIDU
2011-08-16 17:46:28.888 Stream[94612:207] AAPL
2011-08-16 17:46:28.888 Stream[94612:207] AAPL
2011-08-16 17:46:28.889 Stream[94612:207] AMD
2011-08-16 17:46:28.889 Stream[94612:207] GMCR

Answer 1

尝试 [localSet unionSet:serverSet]

编辑

这里的代码只使用符号而不是NSDictionarys:

NSArray *symbols = [NSArray arrayWithObjects:@"AAPL",@"GOOG",@"INTC",@"YHOO",nil];

NSArray *fetchedSymbols = [NSArray arrayWithObjects:@"AMD",@"BIDU",@"GOOG",@"GMCR",@"INTC",@"YHOO",nil];


NSMutableSet* localSet = [[NSMutableSet alloc] initWithArray:symbols];
NSMutableSet* serverSet = [[NSMutableSet alloc] initWithArray:fetchedSymbols];

[localSet unionSet:serverSet];

for (id symbol in localSet) {
    NSLog(@"%@",symbol);
}

2011-08-16 18:25:22.107 so7086790[39810:a0f] YHOO
2011-08-16 18:25:22.116 so7086790[39810:a0f] AMD
2011-08-16 18:25:22.116 so7086790[39810:a0f] AAPL
2011-08-16 18:25:22.116 so7086790[39810:a0f] INTC
2011-08-16 18:25:22.117 so7086790[39810:a0f] GMCR
2011-08-16 18:25:22.117 so7086790[39810:a0f] GOOG
2011-08-16 18:25:22.118 so7086790[39810:a0f] BIDU