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What does %w(array) mean?
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%w(foo bar) is a shortcut for ["foo", "bar"]. Meaning it's a notation to write an array of strings separated by spaces instead of commas and without quotes around them. You can find a list of ways of writing literals in zenspider's quickref.
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How to make Entity Framework Data Context Readonly
I need to expose an Entity Framework Data Context to 3rd party plugins. The purpose is to allow these plugins to fetch data only and not to let them issue inserts, updates or deletes or any other database modification commands. Hence how can I make a data context or entity readonly.
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How to correctly save instance state of Fragments in back stack?
...e instance state by overriding onSaveInstanceState() and restore in onActivityCreated():
class MyFragment extends Fragment {
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
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if (savedInstanceState ...
What's the best way to validate an XML file against an XSD file?
...e a document object model anyway). This will start creating DOM objects as it parses the document - wasteful if you aren't going to use them.
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How to install a specific JDK on Mac OS X?
...un.com/javase/downloads/index.jsp .
I looked for a Mac version, but I'm a bit surprised to only see downloadable versions for Linux, Windows and Solaris ...
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Get all attributes of an element using jQuery
... });
});
What you can also do is extending .attr so that you can call it like .attr() to get a plain object of all attributes:
(function(old) {
$.fn.attr = function() {
if(arguments.length === 0) {
if(this.length === 0) {
return null;
}
var obj = {};
$.ea...
How do I use CSS in Django?
...media files in the template -- say, an image inside an image folder from /site_media/images/foo.gif.
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How to write into a file in PHP?
...contents($filename, $content);
which is identical to calling fopen(), fwrite(), and fclose() successively to write data to a file.
Docs: file_put_contents
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Context switches much slower in new linux kernels
...S on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to believe.
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Displaying the build date
I currently have an app displaying the build number in its title window. That's well and good except it means nothing to most of the users, who want to know if they have the latest build - they tend to refer to it as "last Thursday's" rather than build 1.0.8.4321.
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