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Re: No sure way to tell whether an array is mutable?

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Re: No sure way to tell whether an array is mutable?

Subject: Re: No sure way to tell whether an array is mutable?
From: Graham Perks <email@hidden>
Date: Thu, 25 Jan 2007 20:37:32 -0600

On Jan 25, 2007, at 8:21 PM, Kenny Leung wrote:

NSCFArray insertObject:atIndex:]: mutating method sent to immutable object

According to http://www.cocoadev.com/index.pl?NSMutableArray,

"This happens because of TollFreeBridging. Both NSArray and NSMutableArray are actually implemented using NSCFArray?, so the isKindOfClass: trick won't work here. As far as I know, there is no reliable, documented way to see whether an array is mutable or not besides trying it and seeing whether it works."

Awesome.

Graham Perks.

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