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How to check if object has any properties in JavaScript?
...ave any way to create non-enumerable properties.
However this has changed now with ECMAScript 5th Edition, and we are able to create non-enumerable, non-writable or non-deletable properties, so the above method can fail, e.g.:
var obj = {};
Object.defineProperty(obj, 'test', { value: 'testVal',
...
Docker and securing passwords
...t of docker inspect is probably pretty low on your list of things that can now go wrong. This particular detail seems like acceptable risk to me.
– GrandOpener
Jun 1 '17 at 17:42
...
Rails: create on has_one association
...ser = current_user
@shop = Shop.create(params[:shop])
@user.shop = @shop
Now here's why your version did not work:
You probably thought that this might work because if User had a has_many relation to Shop, @user.shops.create(params[:shop]) would work. However there is a big difference between has...
Are Javascript arrays sparse?
... actual array would be inefficient.
You'll have to ask someone with more knowledge about specific implementations to answer what excatly triggers the shift from dense to sparse, but your example should be perfectly safe. If you want to get a dense array, you should call the constructor with an expl...
Is there a way to make HTML5 video fullscreen?
...
Most of the answers here are outdated.
It's now possible to bring any element into fullscreen using the Fullscreen API, although it's still quite a mess because you can't just call div.requestFullScreen() in all browsers, but have to use browser specific prefixed metho...
What is a smart pointer and when should I use one?
.../ Empty
{
MyObjectPtr p2(new MyObject());
// There is now one "reference" to the created object
p1 = p2; // Copy the pointer.
// There are now two references to the object.
} // p2 is destroyed, leaving one reference to the object.
} // p1 is destroyed, leavi...
What is DOM Event delegation?
...
Event bubbling provides the foundation for event delegation in browsers. Now you can bind an event handler to a single parent element, and that handler will get executed whenever the event occurs on any of its child nodes (and any of their children in turn). This is event delegation. Here's an exa...
Android studio using > 100% CPU at all times - no background processes appear to be running
...S seemed to have a HUGE impact toward the high cpu usage - it was 150% and now it's 20%, more or less.
I'm on OS X
Go to: Preferences > Version Control > Background. Now listed under 'Background Operations' are 6 options.
I disabled the first three options which are:
Perform update on VC...
What is the best way to filter a Java Collection?
...ill cannot believe I am collecting SO points for this answer. At any rate, now that Java 8 has introduced closures to the language, my answer would now be considerably different, and simpler. With Java 8, there is no need for a distinct static utility class. So if you want to find the 1st element th...
Bash variable scope
...piping into the while loop, a sub-shell is created to run the while loop.
Now this child process has its own copy of the environment and can't pass any
variables back to its parent (as in any unix process).
Therefore you'll need to restructure so that you're not piping into the loop.
Alternatively...