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Log to the base 2 in python
...ow that
math.log takes an optional second argument which allows you to specify the base:
In [22]: import math
In [23]: math.log?
Type: builtin_function_or_method
Base Class: <type 'builtin_function_or_method'>
String Form: <built-in function log>
Namespace: Interactive
Docstr...
jQuery, simple polling example
... Please beware though that the suggested code will stop polling if a single request fails. In a typical scenario you would probably want to continue polling anyway. I would not have setTimeout within the success handler but instead chain the ajax call with jQuery always. Like this: $...
Database design for a survey [closed]
...ondering what would be the best way to implement this in the database, specifically the tables required. The survey contains different types of questions. For example: text fields for comments, multiple choice questions, and possibly questions that could contain more than one answer (i.e. check all ...
Finding local maxima/minima with Numpy in a 1D numpy array
...
If you are looking for all entries in the 1d array a smaller than their neighbors, you can try
numpy.r_[True, a[1:] < a[:-1]] & numpy.r_[a[:-1] < a[1:], True]
You could also smooth your array before this step usi...
Why can't I use a list as a dict key in python?
...ists Can't Be Dictionary Keys. As explained there:
What would go wrong if you tried to use lists as keys, with the hash as, say, their memory location?
It can be done without really breaking any of the requirements, but it leads to unexpected behavior. Lists are generally treated as if their v...
How do I echo and send console output to a file in a bat script?
...rect one of the ten streams with > file or < file
It is unimportant, if the redirection is before or after the command,
so these two lines are nearly the same.
dir > file.txt
> file.txt dir
The redirection in this example is only a shortcut for 1>, this means the stream 1 (STDOUT) ...
What is the purpose of “!” and “?” at the end of method names?
...e#sort! sorts it in place.
In Rails, ActiveRecord::Base#save returns false if saving failed, while ActiveRecord::Base#save! raises an exception.
Kernel::exit causes a script to exit, while Kernel::exit! does so immediately, bypassing any exit handlers.
Methods ending in ? return a boolean, which ma...
java.lang.OutOfMemoryError: GC overhead limit exceeded [duplicate]
...out of memory to run the process smoothly. Options that come to mind:
Specify more memory like you mentioned, try something in between like -Xmx512m first
Work with smaller batches of HashMap objects to process at once if possible
If you have a lot of duplicate strings, use String.intern() on them ...
SSH configuration: override the default username [closed]
... User buck
The second example will set a username and is hostname specific, while the first example sets a username only. And when you use the second one you don't need to use ssh example.net; ssh example will be enough.
...
What is the need of JSF, when UI can be achieved with JavaScript libraries such as jQuery and Angula
...s a UI framework and provides some UI components. But how is it better or different from number of components that are available from jQueryUI, AngularJS, ExtJS, or even plain HTML, CSS and JavaScript.
...