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When would you use a WeakHashMap or a WeakReference?
...an image cache is supposed to
prevent us from reloading images when
we don't absolutely need to, you will
quickly realize that the cache should
always contain a reference to any
image which is already in memory. With
ordinary strong references, though,
that reference itself will force ...
Random data in Unit Tests?
...coworker who writes unit tests for objects which fill their fields with random data. His reason is that it gives a wider range of testing, since it will test a lot of different values, whereas a normal test only uses a single static value.
...
How to configure postgresql for the first time?
... postgresql and I specified password x during installation.
When I try to do createdb and specify any password I get the message:
...
How does tuple comparison work in Python?
...<= [1,2,y] has the same value as x <= y). If a corresponding element does not exist, the shorter collection is ordered first (for example, [1,2] < [1,2,3] is true).
If not equal, the sequences are ordered the same as their first differing elements. For example, cmp([1,2,x], [1,2,y]) retur...
Android Fragment onClick button Method
I'm trying to invoke the method in my onClick (View v) XML, but does not work with Fragment. This is the error.
6 Answers
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What are the relationships between Any, AnyVal, AnyRef, Object and how do they map when used in Java
...er in one regard. The classes Any, AnyRef and AnyVal are classes. But they don't appear as classes in bytecode, because of intrinsic limitations of the JVM.
This arises out of the fact that not everything in Java is an object. In addition to objects, there are primitives. All objects in Java are de...
How do you parse and process HTML/XML in PHP?
...ll the 3rd party libs and give me all the control I need over the markup.
DOM
The DOM extension allows you to operate on XML documents through the DOM API with PHP 5. It is an implementation of the W3C's Document Object Model Core Level 3, a platform- and language-neutral interface that allows ...
Adding a simple UIAlertView
...
When you want the alert to show, do this:
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"ROFL"
message:@"Dee dee doo doo."
delegate:self...
How to apply a CSS filter to a background image
...mage"></div>
<div class="content">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Duis aliquam erat in ante malesuada, facilisis semper nulla semper. Phasellus sapien neque, faucibus in malesuada quis, lacinia et libero. Sed sed turpis tellus. Etiam ac aliquam t...
jQuery vs document.querySelectorAll
...ry's strongest asset is the way it queries and manipulates elements in the DOM: you can use CSS queries to create complex queries that would be very hard to do in regular javascript .
However , as far as I know, you can achieve the same result with document.querySelector or document.querySelecto...