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?
···
On 2016-05-30 10:00, swift-users-request@swift.org wrote:
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1. Re: Simple text file I/O with Swift 3 (Quinn "The Eskimo!")
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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-asciiOn 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
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Quinn "The Eskimo!" <http://www.apple.com/developer/>
Apple Developer Relations, Developer Technical Support, Core OS/Hardware------------------------------
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Ken Burgett
Principal Software Engineer
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