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Android static object lifecycle
...cation?
The OS starts a process and assigns it a unique process id and allocates a process table.A process start an instance of DVM(Dalvik VM); Each application runs inside a DVM.
A DVM manages class loading unloading, instance lifecycle, GC etc.
Lifetime of a static variable: A static variable...
Rails: What's a good way to validate links (URLs)?
...l probably reject the following host
http://invalid##host.com
but it will allow
http://invalid-host.foo
that is a valid host, but not a valid domain if you consider the existing TLDs. Indeed, the solution would work if you want to validate the hostname, not the domain because the following one is ...
Inheriting from a template class in c++
... way you speak about them determines the way to think about them.
Specifically, Area is not a template class, but a class template. That is, it is a template from which classes can be generated. Area<int> is such a class (it's not an object, but of course you can create an object from that cl...
ASP.NET MVC: Unit testing controllers that use UrlHelper
One of my controllers actions, one that is being called in an Ajax request, is returning an URL to the client side so it can do a redirection. I'm using Url.RouteUrl(..) and during my unit tests this fails since the Controller.Url parameter is not pre-filled.
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Why do Python's math.ceil() and math.floor() operations return floats instead of integers?
...
The range of floating point numbers usually exceeds the range of integers. By returning a floating point value, the functions can return a sensible value for input values that lie outside the representable range of integers.
Consider: If floor() returned an integ...
Singleton: How should it be used
...rface widgets
It is supposed to be a cache
In strings
In Sessions
I can go all day long
How to create the best singleton:
The smaller, the better. I am a minimalist
Make sure it is thread safe
Make sure it is never null
Make sure it is created only once
Lazy or system initialization? Up to your re...
How to list files in an android directory?
...gt; your app --> permissions --> enable storage. Should do this manually if you are facing this error. Make sure that you have <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> in your manifest. For the people who are facing NullPointerException - you are tryin...
What is the easiest/best/most correct way to iterate through the characters of a string in Java?
... me.
As far as correctness goes, I don't believe that exists here. It is all based on your personal style.
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How do you redirect to a page using the POST verb?
When you call RedirectToAction within a controller, it automatically redirects using an HTTP GET. How do I explicitly tell it to use an HTTP POST?
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How to use LINQ to select object with minimum or maximum property value
...use LINQ to query a list of Person objects for the one with the earliest/smallest DateOfBirth value.
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