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System.currentTimeMillis vs System.nanoTime
...flow.
For example, to measure how long some code takes to execute:
long startTime = System.nanoTime();
// ... the code being measured ...
long estimatedTime = System.nanoTime() - startTime;
See also: JavaDoc System.nanoTime() and JavaDoc System.currentTimeMillis() for more info.
...
How to avoid the need to specify the WSDL location in a CXF or JAX-WS generated webservice client?
...XF (which generates something similar to wsimport), via maven, my services starts with codes like this:
9 Answers
...
How to change a command line argument in Bash?
... is expanded to the two (hence the 2 in the notation) positional arguments starting from offset 1 (i.e. $1). It is a shorthand for "$1" "$2" in this case, but it is much more useful when you want to replace e.g. "${17}".
sha...
How to saveHTML of DOMDocument without HTML wrapper?
...or the complete answer, keep reading for context)
We cut 12 away from the start of the document because <html><body> = 12 characters (<<>>+html+body = 4+4+4), and we go backwards and cut 15 off the end because \n</body></html> = 15 characters (\n+//+<<>&...
Entity Framework - Invalid Column Name '*_ID"
....HasForeignKey(x => x.Pet1ID);
}
}
And with that, EF will (maybe) start to work as you expect. Boom.
Also, you'll get that same error if you use the above with a nullable column - just use .HasOptional() instead of .HasRequired().
Here's the link that put me over the hump:
https://s...
What are good uses for Python3's “Function Annotations”
...Fast-forward to 2015 , python.org/dev/peps/pep-0484 and mypy-lang.org are starting to prove all naysayers wrong.
– Mauricio Scheffer
Sep 23 '15 at 10:37
...
How to set a Django model field's default value to a function call / callable (e.g., a date relative
...e.now()+timedelta(days=1) is absolutely wrong!
It gets evaluated when you start your instance of django. If you are under apache it will probably work, because on some configurations apache revokes your django application on every request, but still you can find you self some day looking through ou...
Label encoding across multiple columns in scikit-learn
... the fit(), transform(), and fit_transform() methods. In your case, a good start might be something like this:
import pandas as pd
from sklearn.preprocessing import LabelEncoder
from sklearn.pipeline import Pipeline
# Create some toy data in a Pandas dataframe
fruit_data = pd.DataFrame({
'fru...
Disable assertions in Python
...al. The value for the built-in variable is determined when the interpreter starts.
From the usage docs:
-O
Turn on basic optimizations. This changes the filename extension for compiled (bytecode) files from .pyc to .pyo. See also PYTHONOPTIMIZE.
and
PYTHONOPTIMIZE
If this is se...
abort, terminate or exit?
...ror site and it cannot exit via an exception, but technically you can even start your message pump inside. For the list of useful things that you can do inside, see my other post.
In particular, note that std::terminate is considered an exception handler in contexts where std::terminate is called d...