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Adding new column to existing DataFrame in Python pandas
...1['a'])
>>> df1
a b c d
6 -0.269221 -0.026476 0.997517 1.294385
8 0.917438 0.847941 0.034235 -0.448948
>>> df1['e'] = pd.Series(np.random.randn(sLength), index=df1.index)
>>> df1
a b c d e
6 ...
Null vs. False vs. 0 in PHP
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221
It's language specific, but in PHP :
Null means "nothing". The var has not been initialized.
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Differences between Oracle JDK and OpenJDK
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edited Dec 22 '18 at 18:06
Greg Dubicki
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When should I use a composite index?
...ecimals as such:
home_id geolat geolng
1 20.1243 50.4521
2 22.6456 51.1564
3 13.5464 45.4562
4 55.5642 166.5756
5 24.2624 27.4564
6 62.1564 24.2542
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Since geolat and geolng values hardly repeat itself. A composite index on geolat and geolng would look...
Why Doesn't C# Allow Static Methods to Implement an Interface?
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Assuming you are asking why you can't do this:
public interface IFoo {
void Bar();
}
pub...
How to create a generic array in Java?
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answered Feb 9 '09 at 22:19
VarkhanVarkhan
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jquery's append not working with svg element?
...n aside.
– QueueHammer
Dec 1 '14 at 22:53
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Simple insecure two-way data “obfuscation”?
...place_Me__({ 123, 217, 19, 11, 24, 26, 85, 45, 114, 184, 27, 162, 37, 112, 222, 209, 241, 24, 175, 144, 173, 53, 196, 29, 24, 26, 17, 218, 131, 236, 53, 209 });
// a hardcoded IV should not be used for production AES-CBC code
// IVs should be unpredictable per ciphertext
private byte[] ...
Why is f(i = -1, i = -1) undefined behavior?
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harmicharmic
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Is it worth hashing passwords on the client side
...toNeighborFriendlyCryptoNeighbor
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