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How do I (or can I) SELECT DISTINCT on multiple columns?
...on the same day for the same price. The sales that are unique based on day and price will get updated to an active status.
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How to see top processes sorted by actual memory usage?
...asted memory". The Linux kernel keeps around huge amounts of file metadata and files that were requested, until something that looks more important pushes that data out. It's why you can run:
find /home -type f -name '*.mp3'
find /home -type f -name '*.aac'
and have the second find instance run a...
File system that uses tags rather than folders?
...d to ship with Vista but due to technical problems the project was delayed and as far as I know finally canceled. NTFS is also capable of storing metadata for files but not to an extend of a full featured database file system.
The integration of such a file system into an operating system should no...
What exactly is an Assembly in C# or .NET?
...on a given machine. That compiled code will also be stored in the assembly and reused on subsequent calls.
The assembly can also contain resources like icons, bitmaps, string tables and so on. Furthermore, the assembly also contains metadata in the assembly manifest - information like version numbe...
How to duplicate object properties in another object?
...useful, I consider the idea of applying any rules to any situation harmful and unwise. Like all these pattern-driven development practices that are going on, so don't take it personal…
– Michael Krelin - hacker
Oct 3 '12 at 20:03
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How to REALLY show logs of renamed files with git?
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I think that the general drive behind Linus point is that - and take this with a pinch of salt - hardcore git users don't ever care about the history of a "file". You put content in a git repository because the content as a whole has a meaningful history.
A file rename is a small spe...
What is the difference between Fragment and FragmentActivity?
... inheritance differences, what are the main differences between Fragment and FragmentActivity ? To what scenarios are each class best suited? I'm trying to get an understanding of why both of these classes exist...
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Find out what process registered a global hotkey? (Windows API)
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Your question piqued my interest, so I've done a bit of digging and while, unfortunately I don't have a proper answer for you, I thought I'd share what I have.
I found this example of creating keyboard hook (in Delphi) written in 1998, but is compilable in Delphi 2007 with a couple of tw...
What's the false operator in C# good for?
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You can use it to override the && and || operators.
The && and || operators can't be overridden, but if you override |, &, true and false in exactly the right way the compiler will call | and & when you write || and &&.
For example, ...
Python ElementTree module: How to ignore the namespace of XML files to locate matching element when
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Instead of modifying the XML document itself, it's best to parse it and then modify the tags in the result. This way you can handle multiple namespaces and namespace aliases:
from io import StringIO # for Python 2 import from StringIO instead
import xml.etree.ElementTree as ET
# instead of...