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Difference between a Message Broker and an ESB
... engineering loose coupling. Its definition is fought over and not exactly set in stone. In general, an ESB is set of unrelated (in a technical sense) services - they expose interfaces, and they consume them from other services. Generally there isn't a hub and spoke architecture involved, although t...
Why not use Double or Float to represent currency?
I've always been told never to represent money with double or float types, and this time I pose the question to you: why?
...
How can I read a whole file into a string variable
... editor after snippets, if snippets enabled
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How do I create an empty array/matrix in NumPy?
...ding rows, your best bet is to create an array that is as big as your data set will eventually be, and then add data to it row-by-row:
>>> import numpy
>>> a = numpy.zeros(shape=(5,2))
>>> a
array([[ 0., 0.],
[ 0., 0.],
[ 0., 0.],
[ 0., 0.],
[ 0., 0.]])
&...
Why is XOR the default way to combine hashes?
...
Assuming uniformly random (1-bit) inputs, the AND function output probability distribution is 75% 0 and 25% 1. Conversely, OR is 25% 0 and 75% 1.
The XOR function is 50% 0 and 50% 1, therefore it is good for combining uniform probabilit...
JavaScript inheritance: Object.create vs new
...uted with the new keyword. This usually is not intended - you only want to set up the prototype chain. In some cases it even could cause serious issues because you actually instantiate an object, whose private-scoped variables are shared by all MyClass instances as they inherit the same privileged m...
SQL UPDATE SET one column to be equal to a value in a related table referenced by a different column
...
update q
set q.QuestionID = a.QuestionID
from QuestionTrackings q
inner join QuestionAnswers a
on q.AnswerID = a.AnswerID
where q.QuestionID is null -- and other conditions you might want
I recommend to check what the result set to ...
How do I read / convert an InputStream into a String in Java?
...(Apache Utils)
String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8);
Using CharStreams (Guava)
String result = CharStreams.toString(new InputStreamReader(
inputStream, Charsets.UTF_8));
Using Scanner (JDK)
Scanner s = new Scanner(inputStream).useDelimiter("\\A");
Strin...
Can someone give an example of cosine similarity, in a very simple, graphical way?
...o the vectors.
VERY similar documents (again with regards to this limited set of dimensions) would have the very same number of references to Paris, AND the very same number of references to London, or maybe, they could have the same ratio of these references. A Document, Doc2, with 2 refs to Paris...
How do I declare an array of weak references in Swift?
...
It's kind of late for party, but try mine. I implemented as a Set not an Array.
WeakObjectSet
class WeakObject<T: AnyObject>: Equatable, Hashable {
weak var object: T?
init(object: T) {
self.object = object
}
var hashValue: Int {
if let object = ...