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How to do ToString for a possibly null object?
...# 6.0 we can now have a succinct, cast-free version of the orignal method:
string s = myObj?.ToString() ?? "";
Or even using interpolation:
string s = $"{myObj}";
Original Answer:
string s = (myObj ?? String.Empty).ToString();
or
string s = (myObjc ?? "").ToString()
to be even more concise.
Unfo...
Using Enum values as String literals
What is the best way to use the values stored in an Enum as String literals?
For example:
18 Answers
...
pip install from git repo branch
...ango 1.9 on, Django ships with a file that has a unicode filename. The zip extractor used by pip chokes on that. An easy workaround is to replace .zip with .tar.gz, as the tar extractor works.
– spectras
Jul 3 '16 at 11:56
...
How to put a new line into a wpf TextBlock control?
...
baz bar</data>
If that does not work you might need to parse the string manually.
If you need direct XAML that's easy by the way:
<TextBlock>
Lorem <LineBreak/>
Ipsum
</TextBlock>
share...
Specifying a custom DateTime format when serializing with Json.Net
...y ARE correct, although they are not strictly necessary here. See Literal String Delimiters in the documentation for Custom Date and Time Format Strings. However, the format I quoted as the default format for the IsonDateTimeConverter was taken directly from the Json.Net source code; therefore I a...
Django REST Framework: adding additional field to ModelSerializer
...
So, based on this answer, if you want to pass say 12 extra fields to your serializer, you need to define 12 specific methods for each field that just returns foo.field_custom ?
– AlxVallejo
Apr 13 '18 at 19:13
...
Safe characters for friendly url [closed]
...etter off using a "white list" of allowed characters and then encoding the string rather than trying to stay abreast of characters that are disallowed by servers and systems.
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reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
...ces:
"Reads and writes of the following
data types are atomic: bool, char,
byte, sbyte, short, ushort, uint, int,
float, and reference types."
So, you can write to the volatile reference without risk of getting a corrupted value.
You should of course be careful with how you decide which...
How do I create a comma-separated list from an array in PHP?
...r if you want to manipulate that data in the array before making it into a string; For example, addslashes, or mysql_real_escape_string.
– Naphtali Gilead
Aug 21 '15 at 15:48
...
Understanding colors on Android (six characters)
...th.round(i * 100) / 100.0d;
int alpha = (int) Math.round(i * 255);
String hex = Integer.toHexString(alpha).toUpperCase();
if (hex.length() == 1)
hex = "0" + hex;
int percent = (int) (i * 100);
System.out.println(String.format("%d%% — %s", percent, hex));
}
Output:
10...