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Using async-await on .net 4
I'm currently starting to create an application that would profit a lot from C# 5's async-await feature. But I'm not sure which version of VS and of the async runtime to use.
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Find (and kill) process locking port 3000 on Mac
...in a single command.
For using this in package.json scripts:
"scripts": { "start": "kill $(lsof -ti:3000,3001) && npm start" }
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Highlight bash/shell code in markdown
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thanks this help me in this moment that I started a documentaion in MarkDown files.
– LandiLeite
Jul 20 at 21:58
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Catch an exception thrown by an async void method
...y on the SynchronizationContext that was active when the async void method started. - https://msdn.microsoft.com/en-us/magazine/jj991977.aspx
Note that using Wait() may cause your application to block, if .Net decides to execute your method synchronously.
This explanation http://www.interact-sw.c...
Purpose of #!/usr/bin/python3
...ges, but in this example, I am using python. In many tutorials, they would start with #!/usr/bin/python3 on the first line. I don't understand why we have this.
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PDO's query vs execute
...ment, and hopefully you can replicate it or something better in yours:
To start, I've created a basic table in Microsoft SQL Server
CREATE TABLE performancetest (
sid INT IDENTITY PRIMARY KEY,
id INT,
val VARCHAR(100)
);
And now a basic timed test for performance metrics.
$logs = []...
Copy folder structure (without files) from one location to another
... xargs can exceed the maximum command length of the system when you start dealing with orders of hundreds or thousands, so use this with caution. (Find the command length limit with getconf ARG_MAX.) With a lot of directories, you may have to write a script to loop through the output instead....
JOIN queries vs multiple queries
... depending on whether or not you're planning on scaling. Cuz when facebook started out I'm sure they had those kind of queries, but had scaling in mind and went for the more efficient albeit possibly more complex solution.
– dudewad
Jul 4 '13 at 23:04
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Correct way to use StringBuilder in SQL
... listed some_appropriate_size in the StringBuilder constructor, so that it starts out with enough capacity for the full content we're going to append. The default size used if you don't specify one is 16 characters, which is usually too small and results in the StringBuilder having to do reallocatio...
How to center a (background) image within a div?
...e background-position property .
The background-position property sets the starting position of a background image from top and left sides of the element .
The CSS Syntax is background-position : xvalue yvalue; .
"xvalue" and "yvalue" supported values are length units like px and percentage and dir...