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What is the meaning of addToBackStack with null parameter?
...ansaction (such as another add()
or remove()) and call addToBackStack(), then all changes applied
before you call commit() are added to the back stack as a single
transaction and the Back button will reverse them all together.
The order in which you add changes to a FragmentTransaction doesn...
How many random elements before MD5 produces collisions?
... billion 768 million 211 thousand 456.
However if you keep all the hashes then the probability is a bit higher thanks to birthday paradox. To have a 50% chance of any hash colliding with any other hash you need 264 hashes. This means that to get a collision, on average, you'll need to hash 6 billio...
Private and Protected Members : C++
...d protect the implementation of the base class, but if that's not possible then use protected members. Check C++ FAQ for a better understanding of the issue. This question about protected variables might also help.
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Creating a favicon [closed]
...f you already have a logo image that you want to transform into a favicon, then you can convert it using http://www.favicomatic.com/.
It creates crisp favicons, and I haven't had to edit them after creating them.
It will generate favicons at 16x16 and 32x32 and to quote them: "Every damn size, sir!...
What is the facade design pattern?
...terns is to be able to recognize which pattern fits your given problem and then using it appropriately. It is a very common thing to misuse a pattern or trying to fit it to some problem just because you know it. Be aware of those pitfalls while learning\using design patterns.
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versionCode vs versionName in Android Manifest
... version name is displayed to the user.
If you have increased version code then update will be visible to all user.
For more detailed inform you give 2 minute reading to this article https://developer.android.com/studio/publish/versioning.html
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Select text on input focus
...nput type="text" ng-model="content" ng-click="onTextClick($event)" />
Then in your controller:
$scope.onTextClick = function ($event) {
$event.target.select();
};
Here is an example fiddle.
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Why is 'false' used after this simple addEventListener function?
...ent processing.
The event first goes down - that’s called capturing, and then bubbles up . This behavior is standartized in W3C specification.
which means no matter what you set the useCapture to, these two event phases always exist.
This picture shows how it works.
According to this model, the...
Have a reloadData for a UITableView animate when changing
...sn't work if the end state has more/less sections than the starting state. Then you'd have to manually track which sections got added/deleted, which is quite a hassle.
– nikolovski
Jul 8 '14 at 11:57
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Sockets: Discover port availability using Java
...for me is to do the above and also to open a new Socket("localhost", port) then return false if we don't get an exception. Thoughts?
– Partly Cloudy
Jan 16 '12 at 22:59
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