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Node.js / Express.js - How does app.router work?
...are now processed in precisely the order in which they are added.
In other words:
All routing methods will be added in the order in which they appear. You should not do app.use(app.router). This eliminates the most common issue with Express.
In other words, mixing app.use() and app[VERB]() will wor...
What is the purpose of Flask's context stacks?
...ferent Flask applications being created "frontend" and "backend". In other words, the Flask(...) application constructor has been called twice, creating two instances of a Flask application.
Contexts
When you are working with Flask, you often end up using global variables to access various functio...
How important is the order of columns in indexes?
...eep them only on the leaf pages, for query coverability purposes. In other words, move them to INCLUDE. This becomes more important as the size of Least column increases. The idea is that this index can only benefit queries that specify MostSelective either as an exact value or a range, and that col...
What is the difference between RDF and OWL? [closed]
...amework) is that you can describe resources (anything) with sets of only 3 words (terms). At this level you don't care about how you are storing information, whether you have a string of 3 words, or a painting on a wall, or a table with 3 columns etc.
At this conceptual level the only thing that is...
Left Align Cells in UICollectionView
...e beginning of a new line which is not necessarily the case.
So in other words:
Most of the solutions suggested on this page work for some specific applications, but they don't work as expected in every situation.
AlignedCollectionViewFlowLayout
In order to address these issues I've created a...
DateTime vs DateTimeOffset
...lues, they are first normalized to zero offset before comparing. In other words, 2012-01-01T00:00:00+00:00 and 2012-01-01T02:00:00+02:00 refer to the same instantaneous moment, and are therefore equivalent.
If you are doing any unit testing and need to be certain of the offset, test both the DateTi...
Using .NET, how can you find the mime type of a file based on the file signature not the extension
...t the mimetype for .docx is "application/vnd.openxmlformats-officedocument.wordprocessingml.document". While this CAN be determined from a binary-only examination, it's probably not the most efficient way to do it, and in most cases you would have to read in more than the first 256 bytes.
...
Difference between Python's Generators and Iterators
...he yield statement, in depth on my answer to "What does the “yield” keyword do?".
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Override Java System.currentTimeMillis for testing time sensitive code
...le, lock in the first moment of the earliest Christmas this year. in other words, when Santa and his reindeer make their first stop. The earliest time zone nowadays seems to be Pacific/Kiritimati at +14:00.
LocalDate ld = LocalDate.now( ZoneId.of( "America/Montreal" ) );
LocalDate xmasThisYear = Mon...
Stack vs heap allocation of structs in Go, and how they relate to garbage collection
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It's worth noting that the words "stack" and "heap" do not appear anywhere in the language spec. Your question is worded with "...is declared on the stack," and "...declared on the heap," but note that Go declaration syntax says nothing about stack or...