swift-users Digest, Vol 6, Issue 28

(John Myers) #1

Is there a way to format the text in the following link that appeared in
today's digest? The code toward the bottom is all run together. I would
edit to correct it if that were possible.



On Mon, May 30, 2016 at 12:00 PM, <swift-users-request@swift.org> wrote:

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Today's Topics:

   1. Re: Simple text file I/O with Swift 3 (Quinn "The Eskimo!")


Message: 1
Date: Mon, 30 May 2016 09:11:41 +0100
From: "Quinn \"The Eskimo!\"" <eskimo1@apple.com>
To: Swift Users List <swift-users@swift.org>
Subject: Re: [swift-users] Simple text file I/O with Swift 3
Message-ID: <D94A5001-BE92-44FB-ADB8-CE0D68E62323@apple.com>
Content-Type: text/plain; charset=us-ascii

On 28 May 2016, at 19:05, Ken Burgett via swift-users < > swift-users@swift.org> wrote:

> print(buf)

The trick here is to replace the above line with:

    print(String(validatingUTF8: buf))

`fgets` sets up `buf` to hold a C string, so you have to convert it to a
Swift string. How do you do this depends on the encoding of the bytes. If
you expect the C string to be UTF-8, then `String(validatingUTF8:)` is the
way to go.

IMPORTANT: This conversion can fail, which is why the above will print a
bunch of optional strings, and you will have to decide what to your program
should do when it does.

                   * * *

btw This question came up recently. See the thread for other suggestions
about how to handle it.


Share and Enjoy
Quinn "The Eskimo!" <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware


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End of swift-users Digest, Vol 6, Issue 28

John Myers
Mathematics and Computer Science Teacher