[swift-users] NSData vs Data write to string differently?

[Martin R]

I had filed a related bug

  https://bugs.swift.org/browse/SR-2514
  Add a "hex dump" method to `Data`

as a result of the discussion starting at

  https://lists.swift.org/pipermail/swift-users/Week-of-Mon-20160822/003035.html

Martin


> On 23 Sep 2016, at 03:47, Joe Groff via swift-users <swift-users at swift.org> wrote:
> 
> 
>> On Sep 22, 2016, at 4:04 PM, Shawn Erickson via swift-users <swift-users at swift.org> wrote:
>> 
>> In general you shouldn't depend on what description returns for classes, etc. outside of your control unless it is documented (e.g. part of the API contract). If you want a specific output you should code up something to format the output as you need.
> 
> This is good advice, but the printing behavior of Data nonetheless strikes me as a bug. NSData's printing behavior seems much more useful than Data's. If either of you have a moment, would you be able to file a bug about this?
> 
> -Joe
> 
>> -Shawn
>> 
>> On Thu, Sep 22, 2016 at 3:33 PM Robert Nikander via swift-users <swift-users at swift.org> wrote:
>> Hi,
>> 
>> I’ve run into a problem when updating to new Swift in Xcode 8. There was some NSData in a string like this:
>> 
>>    “ … \(data) … “
>> 
>> It changed to type `Data`, and the string went from hexadecimal bytes to writing “20 bytes”. I’m doing a quick bug fix app release now. I can’t remember if Xcode auto converted this for me. I thought it did.  ?  Either way… seems like they should behave the same here, no?
>> 
>> Rob
>> 
>> 
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