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Background color not showing in print preview
...all your print CSS from your screen CSS. This is done via the @media print and @media screen.
Often times just setting up some extra @media print CSS is not enough because you still have all your other CSS included when printing as well. In these cases you just need to be aware of CSS specificity a...
How to use WPF Background Worker
...gress (optional, but often useful)
a) subscribe to ProgressChanged event and use ReportProgress(Int32) in DoWork
b) set worker.WorkerReportsProgress = true; (credits to @zagy)
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Spring - @Transactional - What happens in background?
...hapters to it. I recommend reading the ones on Aspect-Oriented Programming and Transactions, as Spring's declarative transaction support uses AOP at its foundation.
But at a very high level, Spring creates proxies for classes that declare @Transactional on the class itself or on members. The proxy ...
How to color the Git console?
...the Unix & Linux Stackexchange question How to colorize output of git? and the answer by @Evgeny:
git config --global color.ui auto
The color.ui is a meta configuration that includes all the various color.* configurations available with git commands. This is explained in-depth in git help ...
Print Var in JsFiddle
...console.log() in JSFiddle, go to External Resources on the left-side panel and add the following link for Firebug:
https://getfirebug.com/firebug-lite-debug.js
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Junit - run set up method once
I set up a class with a couple of tests and rather than using @Before I would like to have a setup method that executes only once before all tests. Is that possible with Junit 4.8?
...
Android Preferences: How to load the default values when the user hasn't used the preferences-screen
...s(this, R.xml.preference, false);
It will load your preferences from XML, and last parameter (readAgain) will guarantee that user preferences won't be overwritten. That means setting the readAgain argument to false means this will only set the default values if this method has never been called in ...
Error: free(): invalid next size (fast):
...rror I'm getting? I'm compiling C++ using g++ on Ubuntu 10.10. It pops up randomly when I run the executable (maybe 2 times in 8 hours, with 10 compiles an hour). However, if I make clean and recompile it goes away most of the time.
...
Function overloading in Javascript - Best practices
...ent length or the types; checking the types will just make your code slow and you have the fun of Arrays, nulls, Objects, etc.
What most developers do is tack on an object as the last argument to their methods. This object can hold anything.
function foo(a, b, opts) {
// ...
if (opts['test'...
Creating a singleton in Python
...bute.
A metaclass essentially decides what the definition of a class means and how to implement that definition. See for example http://code.activestate.com/recipes/498149/, which essentially recreates C-style structs in Python using metaclasses. The thread What are some (concrete) use-cases for met...