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Key existence check in HashMap
... return null;
}
Just check if the return value for get() is different from null.
This is the HashMap source code.
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Get DateTime.Now with milliseconds precision
...can't. Usually the system clock (which is where DateTime.Now gets its data from) has a resolution of around 10-15 ms. See Eric Lippert's blog post about precision and accuracy for more details.
If you need more accurate timing than this, you may want to look into using an NTP client.
However, it's...
CSS3 Continuous Rotate Animation (Just like a loading sundial)
... A typical copy-paste error. Thanks a lot! (I actually got my css from shareaholic and because of the wrongly named property, it used the default ease timing function).
– doekman
Feb 15 '12 at 21:24
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Which browsers support ?
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From your referenced page:
http://googlecode.blogspot.com/2009/12/google-analytics-launches-asynchronous.html
Firefox 3.6 is the first browser to officially offer support for this new feature. If you're curious, here are...
What is a covariant return type?
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From the release of JDK 1.5, covariant types were introduced in Java. and I'll explain it to you with a simple case, : When we override a function the function is allowed to make changes to it's behaviour that's what you get ...
Loop through a date range with JavaScript
... = startDate.getTime(), endTime = endDate.getTime();
Then you could loop from one to another incrementing loopTime by 86400000 (1000*60*60*24) - number of milliseconds in one day:
for(loopTime = startTime; loopTime < endTime; loopTime += 86400000)
{
var loopDay=new Date(loopTime)
//use...
How to put a new line into a wpf TextBlock control?
I'm fetching text from an XML file, and I'd like to insert some new lines that are interpreted by the textblock render as new lines.
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Get started with Latex on Linux [closed]
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Create a file called test.tex and put some content in it, say the example from the LaTeX primer:
\documentclass[a4paper,12pt]{article}
\begin{document}
The foundations of the rigorous study of \emph{analysis}
were laid in the nineteenth century, notably by the
mathematicians Cauchy and Weierstrass...
When writing a directive in AngularJS, how do I decide if I need no new scope, a new child scope, or
...ributes."
A good best practice is to exclude as much template-based stuff from the directive link and controller functions as possible. This provides another "API-like" configuration point: the user of the directive can simply replace the template! The functionality all stayed the same, and its int...
iOS / Android cross platform development [closed]
... However if I want to on start on an iOS version I need to code everything from scratch - which is, well, undesirable.
9 An...