字典或数组 [英] Dictionary or Array

问题描述

解决方案

这些是两种不同类型的容器。 Array是一个顺序数据存储，您可以通过索引检索元素。字典是通过名称检索元素的哈希。两者都有优缺点（查找速度，插入时间，枚举等）。

请阅读通用Array vs Hash。

In what situation does it make sense to use a dictionary versus a NSMutableArray?

解决方案

Those are 2 different types of containers. Array is a sequential data storage where you can retrieve elements by index. Dictionary is a hash where you retrieve elements by "names". Both have pros and cons (lookup speed, insertion time, enumeration, etc).

Please read on generic Array vs Hash.

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