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What is the most efficient way to store tags in a database?
...tle:text[]
For more info, see this excellent post by Josh Berkus:
http://www.databasesoup.com/2015/01/tag-all-things.html
There are more various options compared thoroughly for performance and the one suggested above is the best overall.
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Rails: Check output of path helper from console
...; "/posts/3"
app.posts_path
#=> "/posts"
app.posts_url
#=> "http://www.example.com/posts"
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Creating a singleton in Python
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Use a Metaclass
I would recommend Method #2, but you're better off using a metaclass than a base class. Here is a sample implementation:
class Singleton(type):
_instances = {}
def __call__(cls, *args, **kwargs):
if cls not in cls._inst...
Call a python function from jinja2
...h easier. Use the function as you would use a variable (works also in more complex situations): from jinja2 import Template ##newline## def clever_function(): ##newline## return "Hello" ##newline## template = Template("{{ clever_function() }}") ##newline## print(template.render(clever_funct...
Difference between “managed” and “unmanaged”
...resulting in Bytecode).
http://en.wikipedia.org/wiki/Managed_code
http://www.developer.com/net/cplus/article.php/2197621/Managed-Unmanaged-Native-What-Kind-of-Code-Is-This.htm
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When does Java's Thread.sleep throw InterruptedException?
... From Don't swallow interrupts
See the entire paper here:
http://www.ibm.com/developerworks/java/library/j-jtp05236/index.html?ca=drs-
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What's the difference between integer class and numeric class in R
...o append the letter L.
> class(1:5)
[1] "integer"
Reference: https://www.quora.com/What-is-the-difference-between-numeric-and-integer-in-R
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how to set desired language in git-gui?
...) Set the LANG environment variable to en.
a) Overall for Windows: http://www.itechtalk.com/thread3595.html
b) For the git shell only:
If you don't want to affect anything else except git applications you might add the following line in the beginning of C:\Program Files\Git\cmd\git.cmd file:
@se...
How do I disable a Pylint warning?
... results on the same line), in Pylint 0.21.1 (if it matters: astng 0.20.1, common 0.50.3, Python 2.6.6 (r266:84292, Sep 15 2010, 16:22:56)).
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How to get the start time of a long-running Linux process?
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You can specify a formatter and use lstart, like this command:
ps -eo pid,lstart,cmd
The above command will output all processes, with formatters to get PID, command run, and date+time started.
Example (from Debian/Jessie command line)
$ ps -eo pid,lstart,cmd
PID CMD ...