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How many threads can a Java VM support?
...Most of the threads were not doing anything, of course. Once the machine hit around 6500 Threads (in Java), the whole machine started to have problems and become unstable.
My experience shows that Java (recent versions) can happily consume as many Threads as the computer itself can host without pr...
How to access test resources in Scala?
...of data.xml being in $SBT_PROJECT_HOME/src/test/resources/, you can access it in a test like so:
import scala.io.Source
// The string argument given to getResource is a path relative to
// the resources directory.
val source = Source.fromURL(getClass.getResource("/data.xml"))
Of course that sour...
What should go into an .h file?
...rototypes, and enumerations typically go in header files. In a word, "definitions".
Code files (.cpp) are designed to provide the implementation information that only needs to be known in one file. In general, function bodies, and internal variables that should/will never be accessed by other modul...
Rails.env vs RAILS_ENV
... docs, #Rails.env wraps RAILS_ENV:
# File vendor/rails/railties/lib/initializer.rb, line 55
def env
@_env ||= ActiveSupport::StringInquirer.new(RAILS_ENV)
end
But, look at specifically how it's wrapped, using ActiveSupport::StringInquirer:
Wrapping a string in this class ...
ManyRelatedManager object is not iterable
...nswers.all(). Adding the parenthesis invokes the all function to return an iterable.
If you include the parenthesis you're saying "give me all the values in the stores answers so long as that value is also in the wish lists answers". Without the parenthesis you're asking for all the values from th...
How can I set the request header for curl?
...follow
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edited Jul 6 '17 at 13:41
Hassaan
6,15855 gold badges2323 silver badges4444 bronze badges
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Eclipse HotKey: how to switch between tabs?
How can I switch between opened windows in Eclipse? There is Ctrl + F6 , but it's asking me which one I want, but I want switch it like tabs in browser or window in operating system ( Cmd / Win + Tab ) without file-selection from the list. How to do this easy thing in Eclipse?
...
Convert DataFrame column type from string to datetime, dd/mm/yyyy format
...asiest way is to use to_datetime:
df['col'] = pd.to_datetime(df['col'])
It also offers a dayfirst argument for European times (but beware this isn't strict).
Here it is in action:
In [11]: pd.to_datetime(pd.Series(['05/23/2005']))
Out[11]:
0 2005-05-23 00:00:00
dtype: datetime64[ns]
You can...
Javascript: get package.json data in gulpfile.js
...ic question per-se, but how would one get info from the package.json file within the gulpfile.js; For instance, I want to get the homepage or the name and use it in a task.
...
Drawable image on a canvas
...
The good way to draw a Drawable on a canvas is not decoding it yourself but leaving it to the system to do so:
Drawable d = getResources().getDrawable(R.drawable.foobar, null);
d.setBounds(left, top, right, bottom);
d.draw(canvas);
This will work with all kinds of drawables, not on...