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Why would you use Expression rather than Func?
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When you want to treat lambda expressions as expression trees and look inside them instead of executing them. For example, LINQ to SQL gets the expression and converts it to the equivalent SQL statement and submits it to server (rather than executing the lambda).
Conceptually, Expression<Func&l...
Purpose of Django setting ‘SECRET_KEY’
What exactly is the point of the SECRET_KEY in django? I did a few google searches and checked out the docs ( https://docs.djangoproject.com/en/dev/ref/settings/#secret-key ), but I was looking for a more in-depth explanation of this, and why it is required.
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Is a RelativeLayout more expensive than a LinearLayout?
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In a talk at Google I/O 2013 (Writing Custom Views for Android), Romain Guy clarified the misunderstanding that caused everyone to start using RelativeLayouts for everything. A RelativeLayout always has to do two measure passes. Overall it is negligible as long as your view hierarchy ...
Forward host port to docker container
...6 scope global docker0
inet6 fe80::a402:65ff:fe86:bba6/64 scope link
valid_lft forever preferred_lft forever
You will need to tell rabbit/mongo to bind to that IP (172.17.42.1). After that, you should be able to open connections to 172.17.42.1 from within your containers.
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What's a correct and good way to implement __hash__()?
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Aside from the minor overhead from factoring out the __key function, this is about as fast as any hash can be. Sure, if the attributes are known to be integers, and there aren't too many of them, I suppose you could potentially...
Best way to show a loading/progress indicator?
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ProgressDialog is deprecated from Android Oreo. Use ProgressBar instead
ProgressDialog progress = new ProgressDialog(this);
progress.setTitle("Loading");
progress.setMessage("Wait while loading...");
progress.setCancelable(false); // disable dismiss by tapping ou...
Is there an “exists” function for jQuery?
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@abhirathore2006 If you use an id selector and the element doesn't exist then length is 0 and doesn't throw exceptions.
– Robert
Jun 29 '17 at 20:35
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Node.js on multi-core machines
... on one box, one per core and split request traffic between them. This provides excellent CPU-affinity and will scale throughput nearly linearly with core count.
Scaling throughput on a webservice
Since v6.0.X Node.js has included the cluster module straight out of the box, which makes it easy ...
How can I scale an image in a CSS sprite
...nline-block;
background: url('../img/icons/icons.png') no-repeat;
width: 64px;
height: 51px;
overflow: hidden;
zoom:0.5;
-moz-transform:scale(0.5);
-moz-transform-origin: 0 0;
}
.icon-huge{
zoom:1;
-moz-transform:scale(1);
-moz-transform-origin: 0 0;
}
.icon...
git clone through ssh
... Because of your comment @bobbaluba (and and the updated answer), I didn't have to spend 20 minutes on this too. Thanks!
– olafure
Aug 7 '16 at 16:41
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