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INSERT INTO … SELECT FROM … ON DUPLICATE KEY UPDATE
...olumns named in the INSERT INTO clause, and the second part references the SELECT columns.
INSERT INTO lee(exp_id, created_by, location, animal, starttime, endtime, entct,
inact, inadur, inadist,
smlct, smldur, smldist,
larct, lardur, lardist,
...
CMake使用教程 - C/C++ - 清泛网 - 专注C/C++及内核技术
.... This is usually caused by NSIS not
being installed. Please install NSIS from http://nsis.sourceforge.net
CPack Error: Cannot initialize the generator NSIS
make: *** [package] Error 1
安装NSIS之后，运行成功：
D:/Projects/Lab/testngpp/cmake-2.8.1/Tests/Tutorial/Step6/build>make packag...
Manually raising (throwing) an exception in Python
...ns, which preserve tracebacks:
raise RuntimeError('specific message') from error
Be aware:
this does allow changing the error type raised, and
this is not compatible with Python 2.
Deprecated Methods:
These can easily hide and even get into production code. You want to raise an exception...
Efficient evaluation of a function at every cell of a NumPy array
...ion to how vectorize determines the return type. That has produced bugs. frompyfunc is a bit faster, but returns a dtype object array. Both feed scalars, not rows or columns.
– hpaulj
Jul 31 '16 at 12:34
...
How to do exponentiation in clojure?
How can I do exponentiation in clojure?
For now I'm only needing integer exponentiation, but the question goes for fractions too.
...
Logical operators for boolean indexing in Pandas
...nctions (for booleans they are - or at least should be - indistinguishable from the logical functions):
bitwise and: np.bitwise_and or the & operator
bitwise or: np.bitwise_or or the | operator
bitwise not: np.invert (or the alias np.bitwise_not) or the ~ operator
bitwise xor: np.bitwise_xor o...
Pandas percentage of total with groupby
... the sales column by its sum. Copying the beginning of Paul H's answer:
# From Paul H
import numpy as np
import pandas as pd
np.random.seed(0)
df = pd.DataFrame({'state': ['CA', 'WA', 'CO', 'AZ'] * 3,
'office_id': list(range(1, 7)) * 2,
'sales': [np.random.rand...
Equation (expression) parser with precedence?
...ms. Because people
will want to do that!
[2] Yes, I am forever scarred from using that "language".
Also note that when I submitted this entry, the preview was correct, but SO's less than adequate parser ate my close anchor tag on the first paragraph, proving that parsers are not something to be...
Use Expect in a Bash script to provide a password to an SSH command
...
Very dangerous from a security perspective -- command-line arguments can be read by any other process on the system. It's possible to overwrite them, and hopefully sshpass does that, but even then there's a period while it's still starting ...
Convert light frequency to RGB?
...he code found in @user151323 's answer (that is, just a simple translation from pascal code found in Spectra Lab Report):
static private final double Gamma = 0.80;
static private final double IntensityMax = 255;
/**
* Taken from Earl F. Glynn's web page:
* <a href="http://www.efg2.com/Lab/Scie...