Objective-C的 - 如何比较阵列和提取的区别？ [英] Objective-C - How to compare arrays and extract the difference?

问题描述

  

可能的复制：<一href=\"http://stackoverflow.com/questions/1475636/comparing-two-arrays/1475656#1475656\">comparing-two-arrays

我有两个NSArray的，我想从第二阵列创建对象的新阵，但不
包括在第一阵列中的

 示例：NSMutableArray里* firstArray = [NSMutableArray的arrayWithObjects：@条例，@奔，@克里斯，@梅利莎零]
NSMutableArray里* secondArray = [NSMutableArray的arrayWithObjects：@条例，@保罗零]由此产生的阵列应该是：[@保罗零]
 

我解决了这个问题，以双循环比较对象到内部之一。

有没有更好的办法呢？

解决方案

  [secondArray removeObjectsInArray：firstArray];
 

这个想法是从另一个答案。

Possible duplicate: comparing-two-arrays

I have two NSArray and I'd like to create a new Array with objects from the second array but not included in the first array.

Example:

NSMutableArray *firstArray = [NSMutableArray arrayWithObjects:@"Bill", @"Ben", @"Chris", @"Melissa", nil];
NSMutableArray *secondArray = [NSMutableArray arrayWithObjects:@"Bill", @"Paul", nil];

The resulting array should be: 

[@"Paul", nil];

I solved this problem with a double loop comparing objects into the inner one.

Is there a better solutions ?

解决方案

[secondArray removeObjectsInArray:firstArray];

This idea was taken from another answer.

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