Re: The joys of people using valueForKey to get objects out of a dictionary.
Re: The joys of people using valueForKey to get objects out of a dictionary.
- Subject: Re: The joys of people using valueForKey to get objects out of a dictionary.
- From: Mike Abdullah <email@hidden>
- Date: Tue, 10 Nov 2015 16:35:28 +0000
- X_v_e_cd: a14aaa13d59e27537b952689840d5a0b
- X_v_r_cd: c6a5fb8a1d3f1f2d659ba0dc737a5527
> On 10 Nov 2015, at 16:32, Alex Zavatone <email@hidden> wrote:
>
> It's been about 4 or 5 years since I made this mistake but I've just seen a massive swath of code where every access of a dictionary object is using valueForKey instead of objectForKey.
>
> I've got a few examples of why this is a "really bad idea"™, and certainly might explain why lots of that code is wrapped in try/catch blocks.
>
> Am I correct that using valueForKey will raise an exception if the key is missing?
Nope, it’ll cheerfully return nil.
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