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Can I use a :before or :after pseudo-element on an input field?
...the :after CSS pseudo-element on an input field, but it does not work. If I use it with a span , it works OK.
19 Answ...
What do querySelectorAll and getElementsBy* methods return?
...e unique and thus the function always returns exactly one element (or null if none was found).
However, getElementsByClassName(), querySelectorAll(), and other getElementsBy* methods return an array-like collection of elements. Iterate over it like you would with a real array:
var elems = document...
Learning to write a compiler [closed]
...ages using C# 4.0
Interpreter pattern (described in Design Patterns $) specifies a way to evaluate sentences in a language
Language Implementation Patterns: Create Your Own Domain-Specific and General Programming Languages $
Let's Build a Compiler by Jack Crenshaw — The PDF ¶ version (examples ar...
Creating a URL in the controller .NET MVC
...
If you just want to get the path to a certain action, use UrlHelper:
UrlHelper u = new UrlHelper(this.ControllerContext.RequestContext);
string url = u.Action("About", "Home", null);
if you want to create a hyperlink:
str...
Java Synchronized Block for .class
... synchronized(this) ensures that there is exactly one thread per instance. If this makes the actual code in the block thread-safe depends on the implementation. If mutate only state of the instance synchronized(this) is enough.
...
window.onload vs $(document).ready()
What are the differences between JavaScript's window.onload and jQuery's $(document).ready() method?
16 Answers
...
Two way/reverse map [duplicate]
...rd thing in python where I need to keep track of who's talking to whom, so if Alice --> Bob, then that implies that Bob --> Alice.
...
Multiple returns from a function
...unction wtf($blahblah = true) {
$var1 = "ONe";
$var2 = "tWo";
if($blahblah === true) {
return $var2;
}
return $var1;
}
In application:
echo wtf();
//would echo: tWo
echo wtf("not true, this is false");
//would echo: ONe
If you wanted them both, you could modify the fu...
Dynamically Changing log4j log level
What are the different approaches for changing the log4j log level dynamically, so that I will not have to redeploy the application. Will the changes be permanent in those cases?
...
How to add JTable in JPanel with null layout?
... SwingUtilities.updateComponentTreeUI(frame);
if (pack.isSelected()) {
frame.pack();
frame.setMinimumSize(frame.getSize());
}
} catch(Exception e) {
...