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How can we match a^n b^n with Java regex?
...ue in learning about assertions, nested references, possessive quantifier, etc, perhaps the bigger lesson here is the creative process by which one can try to solve problems, the determination and hard work that it often requires when you're subjected to various constraints, the systematic compositi...
Python serialization - Why pickle?
...
Pickling is a way to convert a python object (list, dict, etc.) into a character stream. The idea is that this character stream contains all the information necessary to reconstruct the object in another python script.
As for where the pickled information is stored, usually one wou...
What does Provider in JAX-RS mean?
...y (e.g for mapping to and from XML, translating the most common exceptions etc etc). You can also create your own providers as needed.
The JAX-RS specification is a good reference for reading up on these different provider types and what they do (see Chapter 4).
...
Pushing read-only GUI properties back into ViewModel
...ameworkElement)
{
// WPF 4.0 onwards
frameworkElement.SetCurrentValue(ObservedWidthProperty, frameworkElement.ActualWidth);
frameworkElement.SetCurrentValue(ObservedHeightProperty, frameworkElement.ActualHeight);
// WPF 3.5 and prior
////SetObservedWidth(...
How does the vim “write with sudo” trick work?
...command redirected using tee. The % is nothing but current file name i.e. /etc/apache2/conf.d/mediawiki.conf. In other words tee command is run as root and it takes standard input and write it to a file represented by %. However, this will prompt to reload file again (hit L to load changes in vim it...
Stop Excel from automatically converting certain text values to dates
...P, Unicode U+200B)
is not a big hindrance when viewing the CSV in Notepad (etc),
and could be removed by find/replace in Excel (or Notepad etc).
You don't need to import the CSV, but can simply double-click to open the CSV in Excel.
If there's a reason you don't want to use the tab, look in an Uni...
Context switches much slower in new linux kernels
...you can do this by adding them to the GRUB_CMDLINE_LINUX_DEFAULT entry in /etc/default/grub and then running update-grub. The boot parameters to add are:
intel_idle.max_cstate=0 processor.max_cstate=0 idle=poll
Here are the gory details about what the three boot options do:
Setting intel_idle.ma...
How to make junior programmers write tests? [closed]
...ng over the shoulder of the driver and pointing out suggestions, mistakes, etc as they go). It may seem like a waste of resources, but you will find:
That these guys together can produce code plenty fast and of higher quality.
If your junior guy learns enough to "get it" with a senior guy directi...
What is the best way to remove accents (normalize) in a Python unicode string?
...ulations may significantly alter the meaning of the text. Accents, Umlauts etc. are not "decoration".
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Correct use of flush() in JPA/Hibernate
... flush() sends SQL instructions to the database like INSERT, UPDATE etc. It will not send a COMMIT, so if you have an exception after a flush(), you can still have a complete rollback.
– Flavio
Jun 20 '11 at 8:08
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