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How do you 'redo' changes after 'undo' with Emacs?
...do. If you undo, and then do a non-editing command such as C-f, then the next undo will undo the undo, resulting in a redo.
Longer version:
You can think of undo as operating on a stack of operations. If you perform some command (even a navigation command such as C-f) after a sequence of undo oper...
How to create SBT project with IntelliJ Idea?
... project - modern versions of IntelliJ can import sbt project out of the box, otherwise you can either use sbt plugin to generate IntelliJ project, or use IntelliJ Scala plugin to create sbt project. Basic features work out of the box using both solutions, some complex builds can have problems, so t...
instanceof Vs getClass( )
...ism.
However, there are cases where these are NOT "design smell". For example, in equals(Object) you need to test the actual type of the argument, and return false if it doesn't match. This is best done using getClass().
Terms like "best practice", "bad practice", "design smell", "antipatter...
Why does Eclipse Java Package Explorer show question mark on some classes?
In the Eclipse Helios Java Package Explorer, I see the Java class icons display a small question mark to the right of the 'J', something like [J?]. This icon is shown on each class within one package in my project, but I cannot find an explanation for this in the documentation.
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UTF-8 all the way through
...pport UTF-8 fully in my web application. I have tried this in the past on existing servers and always seem to end up having to fall back to ISO-8859-1.
...
Difference between __getattr__ vs __getattribute__
...-style classes derive from object, old-style classes are those in Python 2.x with no explicit base class. But the distinction between old-style and new-style classes is not the important one when choosing between __getattr__ and __getattribute__.
You almost certainly want __getattr__.
...
Capture screenshot of active window?
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Excellent! I wanted to capture the content of a panel in my app. So I did sc.CaptureWindowToFile(panel1.Handle, "c:\temp.jpg", imageformat.jpg) and voila!
– D. Kermott
Apr 16 '15 at 1...
How to detect my browser version and operating system using JavaScript?
...ajorVersion = parseInt(navigator.appVersion,10);
var nameOffset,verOffset,ix;
// In Opera, the true version is after "Opera" or after "Version"
if ((verOffset=nAgt.indexOf("Opera"))!=-1) {
browserName = "Opera";
fullVersion = nAgt.substring(verOffset+6);
if ((verOffset=nAgt.indexOf("Version"))!=...
Getting key with maximum value in dictionary?
...getter for that:
import operator
stats = {'a':1000, 'b':3000, 'c': 100}
max(stats.iteritems(), key=operator.itemgetter(1))[0]
And instead of building a new list in memory use stats.iteritems(). The key parameter to the max() function is a function that computes a key that is used to determine how...
Why does an NSInteger variable have to be cast to long when used as a format argument?
...
You get this warning if you compile on OS X (64-bit), because on that platform NSInteger is defined as long and is a 64-bit integer. The %i format, on the other hand, is for int, which is 32-bit. So the format and the actual parameter do not match in size.
Since NSI...