Explanation of a NSMutableArray

Explain NSMutableArray.

Could you r开发者_运维百科eset it after all the deletions to put it back to its original state with all the initial variables?

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Please refer this

The main diff between NSArray and NSMutableArray is that NSMutableArray supports insertion and deletion at runtime.

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It's exactly the same as NSArray except for being mutable, or to quote official docs

This class adds insertion and deletion operations to the basic array-handling behavior inherited from NSArray.