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Entity Framework: There is already an open DataReader associated with this Command
...ers = turn on MultipleActiveResultSets. Another scenario when this always happens is when you iterate through result of the query (IQueryable) and you will trigger lazy loading for loaded entity inside the iteration.
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PostgreSQL DISTINCT ON with different ORDER BY
...et is unpredictable unless ORDER BY is used to ensure that the desired row appears first. [...] The DISTINCT ON expression(s) must match the leftmost ORDER BY expression(s).
Official documentation
So you'll have to add the address_id to the order by.
Alternatively, if you're looking for the full...
Learning WebGL and three.js [closed]
...cher Dunn and Ian Parberry
Essential Mathematics for Games and Interactive Applications: A Programmer’s Guide by James M. Van Verth and Lars M. Bishop
Mathematics for 3D Game Programming and Computer Graphics by Eric Lengyel
I hope this is helpful to you. Good luck.
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In Python, what is the difference between “.append()” and “+= []”?
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For your case the only difference is performance: append is twice as fast.
Python 3.0 (r30:67507, Dec 3 2008, 20:14:27) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import timeit
>>> timei...
Fat models and skinny controllers sounds like creating God models [closed]
...ding a lot of blogs which advocate the fat models and skinny controllers approach, esp. the Rails camp. As a result the routers is basically just figuring out what method to call on what controller and all the controller method does is call the corresponding method on the model and then bring up t...
Does every web request send the browser cookies?
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Yes, you could orgnize your site/app structure such that all URLs requiring cookies are wthin /app/ or suchlike - it would retain portability without needing separate subdomains to eliminate redundant overhead. Or you could ditch the now useless Google Anal...
Html table tr inside td
...en I put tr s in td, infact I've put many tr s inside some td s because my app renders arrays of objects within some properties, and it works across all browsers, (don't know about IE, as I did not test it in IE), anyone interested can check it out - stackblitz.com/edit/angular-u7aman , Note: it is ...
What is private bytes, virtual bytes, working set?
...w much memory an executable is actually using, and none of them are really appropriate for debugging a memory leak.
Private Bytes refer to the amount of memory that the process executable has asked for - not necessarily the amount it is actually using. They are "private" because they (usually) exc...
Android and XMPP: Currently available solutions [closed]
...o transfer, last seen, change registration number... almost complete whats app. I have created lots of plugin on openfire
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Creating and Update Laravel Eloquent
...et the price to $99.
// If no matching model exists, create one.
$flight = App\Flight::updateOrCreate(
['departure' => 'Oakland', 'destination' => 'San Diego'],
['price' => 99]
);
which pretty much clears everything.
Query Builder Update
Someone has asked if it is possible using Qu...