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Convert bytes to a string
...
>>> b"abcde"
b'abcde'
# utf-8 is used here because it is a very common encoding, but you
# need to use the encoding your data is actually in.
>>> b"abcde".decode("utf-8")
'abcde'
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How to change the cursor into a hand when a user hovers over a list item?
...irksmode.org/css/user-interface/cursor.html#note (referenced in an earlier comment) states that hand must come after pointer. I recommend using just pointer - IE 5.5 is deader than IE 6.
– Iiridayn
Jul 10 '13 at 21:31
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Regular expression to allow spaces between words
... that one would not usually mean to match:
An empty string, "".
A string comprised entirely of spaces, " ".
A string that leads and / or trails with spaces, " Hello World ".
A string that contains multiple spaces in between words, "Hello World".
Originally I didn't think ...
Failed to serialize the response in Web API with Json
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When it comes to returning data back to the consumer from Web Api (or any other web service for that matter), I highly recommend not passing back entities that come from a database. It is much more reliable and maintainable to use M...
XDocument or XmlDocument
...ch will expect this.
If you get the choice, however, I would thoroughly recommend using XDocument aka LINQ to XML. It's much simpler to create documents and process them. For example, it's the difference between:
XmlDocument doc = new XmlDocument();
XmlElement root = doc.CreateElement("root");
roo...
SQL Server: Filter output of sp_who2
...HAR(MAX),
BlkBy VARCHAR(MAX),
DBName VARCHAR(MAX),
Command VARCHAR(MAX),
CPUTime INT,
DiskIO INT,
LastBatch VARCHAR(MAX),
ProgramName VARCHAR(MAX),
SPID_1 INT,
REQUESTID INT
)
INSERT INTO @Table EXEC sp_who2
SELECT *
FROM ...
How to programmatically take a screenshot on Android?
...new FileOutputStream(imageFile);
int quality = 100;
bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
outputStream.flush();
outputStream.close();
openScreenshot(imageFile);
} catch (Throwable e) {
// Several error may come out wi...
What are invalid characters in XML
...ou do manage to properly escape it into an XML document, most viewers will complain about the invalid character. Edge case but it does happen.
– Rick Strahl
Jan 2 '12 at 9:56
17
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Obtaining a powerset of a set in Java
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Yes, it is O(2^n) indeed, since you need to generate, well, 2^n possible combinations. Here's a working implementation, using generics and sets:
public static <T> Set<Set<T>> powerSet(Set<T> originalSet) {
Set<Set<T>> sets = new HashSet<Set<T>>(...
Indent multiple lines quickly in vi
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Use the > command. To indent five lines, 5>>. To mark a block of lines and indent it, Vjj> to indent three lines (Vim only). To indent a curly-braces block, put your cursor on one of the curly braces and use >% or from anyw...