On 2016-05-30 10:00, swift-users-requ...@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!\"" <eski...@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-ce0d68e62...@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.
<http://article.gmane.org/gmane.comp.lang.swift.user/1943>
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
******************************************
Hi Quinn,
Thanks for the tip on print(String(validatingUTF8: buf)), that does
reproduce my input text, line for line, EXCEPT for wrapping every line
in "Optional(line-of-text-with-terminator)", for example
"Optional("import Glibc\n")".
So, how does wrapping a line of UTF8 text in another character string
"Optional()" help me print the text? Is Optional() some kind of
function? If so, how is it intended to be used?
--
Ken Burgett
Principal Software Engineer
Email: k...@iotone.io
Office: 530.693.4449
Mobile: 831.332.6846
URL: www.iotone.co
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