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MySQL “NOT IN” query
I wanted to run a simple query to throw up all the rows of Table1 where a principal column value is not present in a column in another table ( Table2 ).
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Why is the time complexity of both DFS and BFS O( V + E )
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Your sum
v1 + (incident edges) + v2 + (incident edges) + .... + vn + (incident edges)
can be rewritten as
(v1 + v2 + ... + vn) + [(incident_edges v1) + (incident_edges v2) + ... + (incident_edges vn)]
and the first group is O(N) w...
Difference between ProcessBuilder and Runtime.exec()
...o, for example, on Windows,
Runtime.getRuntime().exec("C:\DoStuff.exe -arg1 -arg2");
will run a DoStuff.exe program with the two given arguments. In this case, the command-line gets tokenised and put back together. However,
ProcessBuilder b = new ProcessBuilder("C:\DoStuff.exe -arg1 -arg2");
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Calculate the center point of multiple latitude/longitude coordinate pairs
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21 Answers
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Case Insensitive Flask-SQLAlchemy Query
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195
You can do it by using either the lower or upper functions in your filter:
from sqlalchemy im...
CursorLoader usage without ContentProvider
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155
I wrote a simple CursorLoader that does not need a content provider:
import android.content.C...
Transfer-Encoding: gzip vs. Content-Encoding: gzip
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Quoting Roy T. Fielding, one of the authors of RFC 2616:
changing content-encoding on the fly in an inconsistent manner
(neither "never" nor "always) makes it impossible for later requests
regarding that content (e.g., PUT or conditional GET) to be handled
correctly. ...
Access denied for user 'test'@'localhost' (using password: YES) except root user
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13 Answers
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Find out whether Chrome console is open
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15 Answers
15
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Unique constraint that allows empty values in MySQL
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183
Yes, you can do this. See the MySQL reference (version 5.5).
A UNIQUE index creates a cons...