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Unique Key constraints for multiple columns in Entity Framework
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With Entity Framework 6.1, you can now do this:
[Index("IX_FirstAndSecond", 1, IsUnique = true)]
public int FirstColumn { get; set; }
[Index("IX_FirstAndSecond", 2, IsUnique = true)]
public int SecondColumn { get; set; }
The second parameter in ...
What is the difference between linear regression and logistic regression?
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15 Answers
15
Active
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RuntimeWarning: invalid value encountered in divide
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157
I think your code is trying to "divide by zero" or "divide by NaN". If you are aware of that a...
switch() statement usage
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120
Well, timing to the rescue again. It seems switch is generally faster than if statements.
So t...
Creating a Radial Menu in CSS
... JS, no SVG, no images (other than the background on the root element).
2015 demo
Screenshots
Chrome 43:
Firefox 38:
IE 11:
Code
The HTML is pretty simple. I'm using the checkbox hack to reveal/ hide the menu.
<input type='checkbox' id='t'/>
<label for='t'>✰</label>...
Matplotlib different size subplots
...np
import matplotlib.pyplot as plt
# generate some data
x = np.arange(0, 10, 0.2)
y = np.sin(x)
# plot it
f, (a0, a1) = plt.subplots(1, 2, gridspec_kw={'width_ratios': [3, 1]})
a0.plot(x, y)
a1.plot(y, x)
f.tight_layout()
f.savefig('grid_figure.pdf')
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How do I merge a list of dicts into a single dict?
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10 Answers
10
Active
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Simple C example of doing an HTTP POST and consuming the response
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188
+50
A messa...
How to Select Every Row Where Column Value is NOT Distinct
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271
This is significantly faster than the EXISTS way:
SELECT [EmailAddress], [CustomerName] FROM [C...