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How to change MySQL data directory?
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Stop MySQL using the following command:
sudo /etc/init.d/mysql stop
Copy the existing data directory (default located in /var/lib/mysql) using the following command:
sudo cp -R -p /var/lib/mysql /newpath
edit the MySQL configuration file with the following...
Why does MSBuild look in C:\ for Microsoft.Cpp.Default.props instead of c:\Program Files (x86)\MSBui
...I got this problem when publishing a cocos2d-x application using their command line tool, which calls MSBuild. I'm using Win 7 64-bit, VS2013 express, cocos2d-x version 3.3, .NET Framework 4.5 installed.
I fixed the problem by setting the following before running the cocos.py publish command:
SET ...
In Perl, how can I read an entire file into a string?
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Add:
local $/;
before reading from the file handle. See How can I read in an entire file all at once?, or
$ perldoc -q "entire file"
See Variables related to filehandles in perldoc perlvar and perldoc -f local.
Incidentally, if you can put your script on the server,...
How to make a promise from setTimeout
This is not a realworld problem, I'm just trying to understand how promises are created.
2 Answers
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What does the restrict keyword mean in C++?
...zation, Christer Ericson says that while restrict is not part of the C++ standard yet, that it is supported by many compilers and he recommends it's usage when available:
restrict keyword
! New to 1999 ANSI/ISO C standard
! Not in C++ standard yet, but supported by many C++ comp...
What is the “owning side” in an ORM mapping?
...-directional relations.
The mapping would create not only tables PERSONS and ID_DOCUMENTS, but would also create a third association table PERSONS_ID_DOCUMENTS:
CREATE TABLE PERSONS_ID_DOCUMENTS
(
persons_id bigint NOT NULL,
id_documents_id bigint NOT NULL,
CONSTRAINT fk_persons FOREIGN KEY...
How do I find the location of my Python site-packages directory?
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There are two types of site-packages directories, global and per user.
Global site-packages ("dist-packages") directories are listed in sys.path when you run:
python -m site
For a more concise list run getsitepackages from the site module in Python code:
python -c 'import sit...
How do I pass parameters into a PHP script through a webpage?
...er that the PHP script needs to run (which I normally pass through the command line when I am testing the script).
2 Answe...
get list from pandas dataframe column
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Pandas DataFrame columns are Pandas Series when you pull them out, which you can then call x.tolist() on to turn them into a Python list. Alternatively you cast it with list(x).
import pandas as pd
data_dict = {'one': pd.Seri...
How do I unload (reload) a Python module?
I have a long-running Python server and would like to be able to upgrade a service without restarting the server. What's the best way do do this?
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