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If my interface must return Task what is the best way to have a no-operation implementation?
...mprove performance even more if you cache the already completed task since all instances of completed tasks are the same:
public static class TaskExtensions
{
public static readonly Task CompletedTask = Task.FromResult(false);
}
With TaskExtensions.CompletedTask you can use the same instance ...
Suggestions for debugging print stylesheets?
...; Rendering Settings > Emulate media > print
– allicarn
Jul 7 '16 at 22:22
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WinDbg基础资料（日本語） - IT优秀资料 - 清泛网 - 专注C/C++及内核技术
...64\taskmgr.exe
参考資料：
http://blogs.msdn.com/b/tess/archive/2010/09/29/capturing-memory-dumps-for-32-bit-processes-on-an-x64-machine.aspx
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Tip07:Crash Dump 自動取得...
SQL update query using joins
...
I usually start with semicolon to terminate previous statement (if any). CTE rocks ! Simple to design complicated query / joined updates. I use it all the time...
– Adam W
Dec 17 '15 at 5:19
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What is the email subject length limit?
How many characters are allowed to be in the subject line of Internet email?
I had a scan of The RFC for email but could not see specifically how long it was allowed to be.
I have a colleague that wants to programmatically validate for it.
...
How to add a border just on the top side of a UIView
... return border
}
if edges.contains(.top) || edges.contains(.all) {
addBorder(formats: "V:|-0-[border(==thickness)]", "H:|-inset-[border]-inset-|")
}
if edges.contains(.bottom) || edges.contains(.all) {
addBorder(formats: "V:[border(==thickness)]-0-|", "H:|-ins...
Find substring in the string in TWIG
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HamZaHamZa
13.1k1010 gold badges4949 silver badges7070 bronze badges
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How to test if a string is JSON or not?
I have a simple AJAX call, and the server will return either a JSON string with useful data or an error message string produced by the PHP function mysql_error() . How can I test whether this data is a JSON string or the error message.
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Conversion failed when converting date and/or time from character string while inserting datetime
...pendent of the dateformat settings in your SQL Server and will NOT work in all situations!
or:
YYYY-MM-DDTHH:MM:SS for dates and times - note here: this format has dashes (but they can be omitted), and a fixed T as delimiter between the date and time portion of your DATETIME.
This is valid for...
Very simple log4j2 XML configuration file using Console and File appender
...n" />
</Console>
<File name="MyFile" fileName="all.log" immediateFlush="false" append="false">
<PatternLayout pattern="%d{yyy-MM-dd HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
</File>
</Appenders>
<Loggers>
...