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What are the lesser known but useful data structures?
...s are painfully expensive, given that a pointer is generally longer than a char, which is a shame. They're only suitable for certain data-sets.
– Joe
Jan 29 '10 at 12:06
18
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Android YouTube app Play Video Intent
...Tube app for my emulator, or...
2. What is the intent used when the user selects a video for playback.
18 Answers
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How to generate a random int in C?
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If you need secure random characters or integers:
As addressed in how to safely generate random numbers in various programming languages, you'll want to do one of the following:
Use libsodium's randombytes API
Re-implement what you need from libsod...
How to use glOrtho() in OpenGL?
...0, 1.5, 20.0);
}
glMatrixMode(GL_MODELVIEW);
}
int main(int argc, char** argv) {
glutInit(&argc, argv);
if (argc > 1) {
ortho = 1;
}
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(500, 500);
glutInitWindowPosition(100, 100);
glutCr...
ALTER DATABASE failed because a lock could not be placed on database
... for a couple of minutes)
CREATE DATABASE TESTING123
GO
USE TESTING123;
SELECT NEWID() AS X INTO FOO
FROM sys.objects s1,sys.objects s2,sys.objects s3,sys.objects s4 ,sys.objects s5 ,sys.objects s6
Connections 2 and 3
set lock_timeout 5;
ALTER DATABASE TESTING123 SET SINGLE_USER WITH ROLLBACK...
Visual Studio: How to break on handled exceptions?
...the VS2010 environement, by going to "Tools", "Import Export Settings" and select a reset to the C# environment... it contains the Exceptions Submenu item
– BeardinaSuit
Feb 14 '12 at 16:28
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Pandas selecting by label sometimes return Series, sometimes returns DataFrame
In Pandas, when I select a label that only has one entry in the index I get back a Series, but when I select an entry that has more then one entry I get back a data frame.
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Freezing Row 1 and Column A at the same time
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Select cell B2 and click "Freeze Panes" this will freeze Row 1 and Column A.
For future reference, selecting Freeze Panes in Excel will freeze the rows above your selected cell and the columns to the left of your selected ce...
Select Pandas rows based on list index
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For large datasets, it is memory efficient to read only selected rows via the skiprows parameter.
Example
pred = lambda x: x not in [1, 3]
pd.read_csv("data.csv", skiprows=pred, index_col=0, names=...)
This will now return a DataFrame from a file that skips all rows except 1 and ...
Cannot insert explicit value for identity column in table 'table' when IDENTITY_INSERT is set to OFF
...need to generate the OperationID by yourself. The new id can be fetched by SELECT SCOPE_IDENTITY().
– Hakan Winther
Aug 26 '09 at 13:29
15
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