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String Literals and KVC

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String Literals and KVC

Subject: String Literals and KVC
From: Sanjay Samani <email@hidden>
Date: Sun, 11 Jun 2006 12:58:36 +0100

I'm using KVC / Core Data for the first time. Not surprisingly I'm often accessing attributes using the KVC valueForKey: message. From previous programming experience, I've always tried to avoid "String Literals" in my code, i.e., things like @"keyName", but rather I try to replace them with string constants declared once in my file and reused throughout. This ensures that I don't get bugs due to typos in stings and saves typing with code completion.

However with KVC its a bit of a trade off because: - Without syntax highlighting of strings, I actually personally find the code to be less readable with string contsntants.

- Also the string constants names have to be name space clean, I end up with silly names like XYMyVariableKey which is even less readable.

- KVC keys are quite easy to debug cos you simply get a runtime error saying xyz object is not KVC compliant for key: garbledKey, so you don't get some of the issues you get with other string literals

As a result I've continued to use valueForKey:@"keyName" rather than valueForKey:XYMyVariableKey

However I was wondering what people's experience with this are when maintaining products further down the line, particularly if there are multiple developers on the project. I want to use a standard approach now which will ensure minimum hassle long term with maintenance.

I'm not keen to write custom accessors unless I need to have custom functionality, to avoid having to debug / unit test them. KVC whilst verbose generally works fine for me.

Thanks,
Sanjay

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