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What's the difference between SoftReference and WeakReference in Java?
... strong enough to
force an object to remain in memory.
Weak references allow you to leverage
the garbage collector's ability to
determine reachability for you, so you
don't have to do it yourself. You
create a weak reference like this:
WeakReference weakWidget = new WeakReference(widget...
Why use the SQL Server 2008 geography data type?
...eographic location of the address. The only use case I have in mind is to allow users to map the coordinates on Google maps when the address cannot otherwise be found, which often happens when the area is newly developed, or is in a remote/rural location.
...
Version vs build in Xcode
...ortVersionString (Version) and CFBundleVersion (Build).
The Version is usually used how you appear to have been using it with Xcode 3. I'm not sure on what level you're asking about the Version/Build difference, so I'll answer it philosophically.
There are all sorts of schemes, but a popular one i...
jQuery selector regular expressions
...
James Padolsey created a wonderful filter that allows regex to be used for selection.
Say you have the following div:
<div class="asdf">
Padolsey's :regex filter can select it like so:
$("div:regex(class, .*sd.*)")
Also, check the official documentation on se...
Sum a list of numbers in Python
...does integer division: it discards the remainder. To divide things through all the way, we need to use floating-point numbers. Fortunately, dividing an int by a float will produce a float, so we just use 2.0 for our divisor instead of 2.
Thus:
averages = [(x + y) / 2.0 for (x, y) in zip(my_list[:-...
What is the colon operator in Ruby?
..." # false
:foo.equal? :foo # true
This makes comparing two symbols really fast (since only a pointer comparison is involved, as opposed to comparing all the characters like you would in a string), plus you won't have a zillion copies of the same symbol floating about.
Also, unlike strings, sy...
Is there a performance difference between i++ and ++i in C++?
...
However, if i is an instance of a C++ class, then i++ and ++i are making calls to one of the operator++ functions. Here's a standard pair of these functions:
Foo& Foo::operator++() // called for ++i
{
this->data += 1;
return *this;
}
Foo Foo::operator++(int ignored_dummy_value) ...
How do I test for an empty JavaScript object?
...do you post answer including jQuery if the question is not about jQuery at all?
– Eru
Oct 1 '12 at 14:10
48
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Spring @PropertySource using YAML
Spring Boot allows us to replace our application.properties files with YAML equivalents. However I seem to hit a snag with my tests. If I annotate my TestConfiguration (a simple Java config), it is expecting a properties file.
...
R and version control for the solo data analyst
... to do this- but has rewinding any file under your current backup system really been a painless, feasible option?
Sometimes the report just looked better 45 minutes, an hour or two days ago.
Collaboration: Most of the time I am
analysing data myself, thus, I
wouldn't get the collaboratio...