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Is there a library function for Root mean square error (RMSE) in python?
..._error function. The RMSE is just the square root of whatever it returns.
from sklearn.metrics import mean_squared_error
from math import sqrt
rms = sqrt(mean_squared_error(y_actual, y_predicted))
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What's the best strategy for unit-testing database-driven applications?
...ying complexity on the backend. Typically, there's an ORM layer separate from the business and presentation logic. This makes unit-testing the business logic fairly straightforward; things can be implemented in discrete modules and any data needed for the test can be faked through object mocking.
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How to find the Git commit that introduced a string in any branch?
... or removed the fixed string whatever. The --all parameter means to start from every branch and --source means to show which of those branches led to finding that commit. It's often useful to add -p to show the patches that each of those commits would introduce as well.
Versions of git since 1.7....
Can a shell script set environment variables of the calling shell? [duplicate]
...d
ln -s setit setit-csh
Now either directly or in an alias, you do this from sh
eval `setit-sh`
or this from csh
eval `setit-csh`
setit uses $0 to determine its output style.
This is reminescent of how people use to get the TERM environment variable set.
The advantage here is that setit i...
Storing money in a decimal column - what precision and scale?
... a popular choice (a quick Google bears this out). I think this originates from the old VBA/Access/Jet Currency data type, being the first fixed point decimal type in the language; Decimal only came in 'version 1.0' style (i.e. not fully implemented) in VB6/VBA6/Jet 4.0.
The rule of thumb for stora...
What is uintptr_t data type
...t standard) even in C++11! cplusplus.com/reference/cstdint (I got the hint from Steve Jessop answer)
– Antonio
Oct 1 '14 at 20:56
2
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Detect the Internet connection is offline?
...n image may not really tell us anything, because we need a useful response from the communication mechanism in order to draw a good conclusion about what's going on. So again, determining the state of the internet connection as a whole may be more trouble than it's worth. You'll have to weight the...
how to get the cookies from a php curl into a variable
... and a string with the header line.
You can use a code like this (adapted from TML response):
$cookies = Array();
$ch = curl_init('http://www.google.com/');
// Ask for the callback.
curl_setopt($ch, CURLOPT_HEADERFUNCTION, "curlResponseHeaderCallback");
$result = curl_exec($ch);
var_dump($cookies)...
What is the difference between PS1 and PROMPT_COMMAND
...
From the GNU Bash doc page: http://www.gnu.org/software/bash/manual/bashref.html
PROMPT_COMMAND
If set, the value is interpreted as a command to execute before
the printing of each primary prompt ($PS1).
I never u...
Transactions in REST?
...ke transactions should be layered ontop, unrelated to the rest calls apart from the fact the request headers would contain a transaction reference.
– meandmycode
Feb 24 '10 at 21:21
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