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Is it possible to use 'else' in a list comprehension? [duplicate]
...re not inherently computationally efficient. It is still running in linear time.
From my personal experience:
I have significantly reduced computation time when dealing with large data sets by replacing list comprehensions (specifically nested ones) with for-loop/list-appending type structures you ...
Sorting a vector of custom objects
...ng the ordering logic which might be a severe drawback (at least when link time optimization/code generation is not applied).
Ways to achieve comparability of class X in order to use standard library sorting algorithms
Let std::vector<X> vec_X; and std::vector<Y> vec_Y;
1. Overload T:...
Can Git hook scripts be managed along with the repository?
...ile is set to copy to the build directory. Thus the project is build every time and is never skipped. In the build event, it also makes sure that all git hooks are in place.
Note that this is not a general solution, as some projects, of course, have nothing to build.
...
Does Android support near real time push notification?
...using GCM SDKs today to handle notifications, and client app upgrade takes time.
As of June 26, 2012, Google Cloud Messaging is the preferred way of sending messages to applications running on devices.
Previously (and now deprecated), the service was called Cloud To Device Messaging.
...
Objective-C: Reading a file line by line
...);
This code reads non-newline characters from the file, up to 4095 at a time. If you have a line that is longer than 4095 characters, it keeps reading until it hits a newline or end-of-file.
Note: I have not tested this code. Please test it before using it.
...
What is the purpose of the reader monad?
...r passing (implicit) configuration information through a computation.
Any time you have a "constant" in a computation that you need at various points, but really you would like to be able to perform the same computation with different values, then you should use a reader monad.
Reader monads are a...
How do I write a custom init for a UIView subclass in Swift?
...In this case, you would initialize them in awakeFromNib() or at some later time.
class TestView : UIView {
var s: String?
var i: Int?
init(s: String, i: Int) {
self.s = s
self.i = i
super.init(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
}
require...
How are the points in CSS specificity calculated
...but it's not base 10. It's base 256. Here's how it works:
(28)2 or 65536, times the number of ids in the selector
+ (28)1 or 256, times the number of class-names in the selector
+ (28)0 or 1, times the number of tag-names in the selector
This isn't very practical for back-of-the-envelop exercises...
How to convert Strings to and from UTF8 byte arrays in Java
...harset class. The JDK documentation lists supported encodings.
90% of the time, such conversions are performed on streams, so you'd use the Reader/Writer classes. You would not incrementally decode using the String methods on arbitrary byte streams - you would leave yourself open to bugs involving ...
What is the behavior difference between return-path, reply-to and from?
...body.
Now, let's describe the different "FROM"s.
The return path (sometimes called the reverse path, envelope sender, or envelope from — all of these terms can be used interchangeably) is the value used in the SMTP session in the MAIL FROM command. As you can see, this does not need to be the...