如何合并两个的NSArray [英] How to merge two NSArray

问题描述

我知道如何合并两个数组包含一些重复： 下面是一个为例来说明什么，我想要做的：

I would know how to merge two array which contain some duplicate : Here is an exemple to illustrate what I want to do :

// Here is some dictionary which contain an unique "id" key.
NSDictionary *dico1 = [NSDictionary dictionaryWithObjectsAndKeys:
                       @"11111111", @"id", nil];
NSDictionary *dico2 = [NSDictionary dictionaryWithObjectsAndKeys:
                       @"22222222", @"id", nil];
NSDictionary *dico3 = [NSDictionary dictionaryWithObjectsAndKeys:
                       @"33333333", @"id", nil];
NSDictionary *dico4 = [NSDictionary dictionaryWithObjectsAndKeys:
                       @"44444444", @"id", nil];
NSDictionary *dico5 = [NSDictionary dictionaryWithObjectsAndKeys:
                       @"55555555", @"id", nil];

// And here is duplicates of the 2nd and 3td dictionary.
NSDictionary *dico2_bis = [NSDictionary dictionaryWithObjectsAndKeys:
                           @"22222222", @"id", nil];
NSDictionary *dico3_bis = [NSDictionary dictionaryWithObjectsAndKeys:
                           @"33333333", @"id", nil];

而现在我有包含一些这些字典的数组：

And now I have an array which contain some of those dictionaries :

NSArray *currentArray = [NSArray arrayWithObjects:
                         dico1, dico2, dico3, nil];

这里是新的数组与其中包含一些重复的和新的数据第一个合并：

And here is the new array to be merged with the first one which contain some duplicate and new "data" :

NSArray *tempArray = [NSArray arrayWithObjects:
                      dico2_bis, dico3_bis, dico4, dico5, nil];

我的目标，在最后阶段，是有它包含了所有字典的数组所有重复删除

My goal, at the final stage, is to have an array which contains all dictionaries with all duplicate deleted

NSArray *finalArray = [NSArray arrayWithObjects:
                       dico1, dico2, dico3, dico4, dico5, nil];

我不知道怎么样才是最有效的解决方案，合并确实有要快。我一定要实现快速枚举或基于块的枚举算法，或者一个NS predicate实现？ 我已经搜索有关NS predicate，但我还没有找到一种方法来筛选与其它阵列= /
数组 任何帮助将是AP preciated。

I don't know how what is the most efficient solution, the merge do have to be fast. Do I have to implement a fast enumeration or a block based enumeration algorithm, or maybe a NSPredicate implementation ?. I've already search about NSPredicate but I've not found a way to filter an array with an other array =/
Any help would be appreciated.

推荐答案

您不要使用NSArrays，你需要的是一套能自动消除重复（一个杜布隆是西班牙金币）。所以，你使用的是简单的的NSMutableSet并添加NSDictionaries吧。

You do not use NSArrays, what you need is a set which automatically eliminates "duplicates" (a "doubloon" is a Spanish gold coin). So you are using simply an NSMutableSet and add your NSDictionaries to it.

NSMutableSet aSet = [NSMutableSet new];
[aSet addObject:dico1];
....

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