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How can I select rows with most recent timestamp for each key value?
I have a table of sensor data. Each row has a sensor id, a timestamp, and other fields. I want to select a single row with latest timestamp for each sensor, including some of the other fields.
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Update ViewPager dynamically?
...ntation. Here's an example for a pager creating fragments off of a list of strings:
ViewPager pager = /* get my ViewPager */;
// assume this actually has stuff in it
final ArrayList<String> titles = new ArrayList<String>();
FragmentManager fm = getSupportFragmentManager();
pager.setAda...
How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
... }
public void checkClientTrusted(X509Certificate[] certs, String authType) {
}
public void checkServerTrusted(X509Certificate[] certs, String authType) {
}
}
};
// Install the all-trusting trust manager
SSLContext ...
Using column alias in WHERE clause of MySQL query produces an error
...an only use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn't allow you to
refer to a column alias in a WHERE
clause. This restriction is imposed
because when the WHERE code is
executed, the column value may not yet
be determined.
Copied from MySQL documen...
Iterate over object attributes in python
...its member of type B. __repr__(), as I understand, is supposed to return a string. But when I call vars(a), it seems like it would make sense for this call to return a nested dict, instead of a dict with a string representation of B.
– plafratt
Apr 19 at 19:25
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Parsing XML with namespace in Python via 'ElementTree'
...rsing only namespace start events (start-ns):
>>> from io import StringIO
>>> from xml.etree import ElementTree
>>> my_schema = u'''<rdf:RDF xml:base="http://dbpedia.org/ontology/"
... xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
... xmlns:owl="http:...
How do I see active SQL Server connections?
...L Server 2008 Enterprise. I want to see any active SQL Server connections, and the related information of all the connections, like from which IP address, connect to which database or something.
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How to get Linux console window width in Python
...pens the 'stty size' command as a file, 'reads' from it, and uses a simple string split to separate the coordinates.
Unlike the os.environ["COLUMNS"] value (which I can't access in spite of using bash as my standard shell) the data will also be up-to-date whereas I believe the os.environ["COLUMNS"]...
AngularJS Multiple ng-app within a page
I have just started learning Angular JS and created some basic samples however I am stuck with the following problem.
13 An...
Creating a dynamic choice field
I'm having some trouble trying to understand how to create a dynamic choice field in django. I have a model set up something like:
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