[swift-users] Foundation on Linux `CFBooleanGetTypeID`/`CFGetTypeID`

[Jens Alfke]

> On May 24, 2016, at 11:03 AM, Tony Parker <anthony.parker at apple.com> wrote:
> 
> Why not use `func boolValue` instead, if you need a true/false answer?

I don’t remember the original code snippet, but there are cases where you need to know what type of number is stored in an NSNumber. An example is encoding to JSON, where a boolean value should be written as “true” or “false”, not “1” or “0”.

—Jens
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