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Re: NaN (Not a Number) Error using Bindings

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Re: NaN (Not a Number) Error using Bindings

Subject: Re: NaN (Not a Number) Error using Bindings
From: "John C. Randolph" <email@hidden>
Date: Tue, 4 Jan 2005 10:50:31 -0800

On Jan 4, 2005, at 10:27 AM, J. Scott Anderson wrote:

- (double)quoteProfitMargin // TODO: Fix this. I get an "NaN" (Not a Number) result in compiled application. { return (double)(quoteExtendedCost / quoteExtendedPrice); }

When you first launch the app, it's quite likely that your bindings are trying to get a value for quoteProfitMargin before any values are set in your model.

I'd try:

- (double) quoteProfitMargin { return quoteExtendedPrice == 0.0 ? 0.0 : (quoteExtendedCost / quoteExtendedPrice); }


-jcr


John C. Randolph <email@hidden> (408) 974-8819
Sr. Cocoa Software Engineer,
Apple Worldwide Developer Relations
http://developer.apple.com/cocoa/index.html


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  >NaN (Not a Number) Error using Bindings (From: "J. Scott Anderson" <email@hidden>)




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