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NSString** in scanners

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NSString** in scanners

Subject: NSString** in scanners
From: "D.K. Johnston" <email@hidden>
Date: Wed, 26 Jul 2006 10:15:19 -0700

Why do scanner methods such as:

	scanCharactersFromSet:intoString:

require an NSString** as their second parameter, rather than simply an NSString*? I want to write a scanner for NSData objects, so I'm curious about what is happening under the hood.

dkj
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