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How to declare global variables in Android?
...em you are encountering is how to save state across several Activities and all parts of your application. A static variable (for instance, a singleton) is a common Java way of achieving this. I have found however, that a more elegant way in Android is to associate your state with the Application con...
Apache Kafka vs Apache Storm
...at has distributed real time processing abilities, meaning you can execute all kind of manipulations on real time data in parallel.
The common flow of these tools (as I know it) goes as follows:
real-time-system --> Kafka --> Storm --> NoSql --> BI(optional)
So you have your real time...
How to calculate md5 hash of a file using javascript
...there are JS implementations of the MD5 algorithm, older browsers are generally unable to read files from the local filesystem.
I wrote that in 2009. So what about new browsers?
With a browser that supports the FileAPI, you *can * read the contents of a file - the user has to have selected it, eit...
Get person's age in Ruby
... of someone born on the 29th February on a leap year. This is because the call to birthday.to_date.change(:year => now.year) creates an invalid date.
I used the following code instead:
require 'date'
def age(dob)
now = Time.now.utc.to_date
now.year - dob.year - ((now.month > dob.month |...
How do I get an HttpContext object from HttpContextBase in ASP.NET MVC 1?
... Smyrnow who noted this in the comments)
Original answer:
You can, especially if the HttpContextBase instance you've been handed is of type HttpContextWrapper at run-time. The following example illustrates how you can do this. It supposes you have a method called Foo that accepts context as HttpCo...
What is the purpose of fork()?
...
fork() is how you create new processes in Unix. When you call fork, you're creating a copy of your own process that has its own address space. This allows multiple tasks to run independently of one another as though they each had the full memory of the machine to themselves.
Here ...
What code analysis tools do you use for your Java projects? [closed]
...n rewrite them. Some of these tools come with applications or "hooks" that allow them to be extended. For example, PMD comes with the "designer" tool that allows you to create new rules. Also, Checkstyle has the DescendantToken check that has properties that allow for substantial customization.
I i...
Can anyone explain what JSONP is, in layman terms? [duplicate]
...nly used to
bypass the cross-domain policies in web browsers. (You are not allowed to make AJAX requests to a web page perceived to be on a different server by the browser.)
JSON and JSONP behave differently on the client and the server. JSONP requests are not dispatched using the XMLHTTPRequest an...
How to create a new database using SQLAlchemy?
...
On postgres, three databases are normally present by default. If you are able to connect as a superuser (eg, the postgres role), then you can connect to the postgres or template1 databases. The default pg_hba.conf permits only the unix user named postgres to u...
Variable declared in for-loop is local variable?
...
The reason you are not allowed to define a variable with the same name in both the for-loop as well as outside the for-loop is because variables in the outer-scope are valid in the inner-scope. Meaning that there would be two 'i' variables within t...