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Principal component analysis in Python
... def pc( self ):
""" e.g. 1000 x 2 U[:, :npc] * d[:npc], to plot etc. """
n = self.npc
return self.U[:, :n] * self.d[:n]
# These 1-line methods may not be worth the bother;
# then use U d Vt directly --
def vars_pc( self, x ):
n = self.npc
retu...
How do I see what character set a MySQL database / table / column is?
...probably also need to check connection character_set, client_character_set etc... : SHOW VARIABLES LIKE 'character_set%'; SHOW VARIABLES LIKE 'collation%';
– BenL
Feb 6 '15 at 9:54
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REST vs JSON-RPC? [closed]
...ocedure signatures(number of arguments, order of arguments, argument types etc...) on server side without breaking client implementations;
RPC style doesn't expose anything but procedure endpoints + procedure arguments. It's impossible for client to determine what can be done next.
On the other ha...
What is the purpose of the -m switch?
...m more is possible, like working with modules which are part of a package, etc. That's what the rest of PEP 338 is about. Read it for more info.
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What is a callback function?
...method is called (whatever condition, such as a button click, a timer tick etc) and its method body completes, the callback function is then invoked.
Some languages support constructs where multiple callback function arguments are supported, and are called based on how the parent function completes...
What's the use of ob_start() in php?
...d to have Javascript or HTML as a string in my PHP, constantly escaping \" etc, which is annoying
– J-Dizzle
Nov 5 '14 at 17:14
1
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CSS styling in Django forms
... previous link for other options when outputting forms (you can do tables, etc).
Note - I realize this isn't the same as adding a class to each element (if you added a field to the Form, you'd need to update the CSS also) - but it's easy enough to reference all of the fields by id in your CSS like ...
Programmatically generate video or animated GIF in Python?
...re a Python library that will allow me to create either a video (AVI, MPG, etc) or an animated GIF from these frames?
22 An...
Rails 3.1: Engine vs. Mountable App
... gem in Gemfile is enough for the parent app to inherit the models, routes etc. The engine routes are specified as:
# my_engine/config/routes.rb
Rails.application.routes.draw do
# whatever
end
No namespacing of models, controllers, etc. These are immediately
accessible to the parent app...
How to send a PUT/DELETE request in jQuery?
... this question for more info on compatibility:
Are the PUT, DELETE, HEAD, etc methods available in most web browsers?
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