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How to sort two lists (which reference each other) in the exact same way
...s problem is to use the "decorate, sort, undecorate" idiom, which is especially simple using python's built-in zip function:
>>> list1 = [3,2,4,1, 1]
>>> list2 = ['three', 'two', 'four', 'one', 'one2']
>>> list1, list2 = zip(*sorted(zip(list1, list2)))
>>> list1
...
Qt events and signal/slots
...resents a new abstraction: a widget that acts like a button, but with some extra functionality. We added this functionality very conveniently:
Since we reimplemented a virtual, our implementation automatically became encapsulated in our class. If Qt's designers had made keyPressEvent a signal, we ...
Principal component analysis in Python
...
Months later, here's a small class PCA, and a picture:
#!/usr/bin/env python
""" a small class for Principal Component Analysis
Usage:
p = PCA( A, fraction=0.90 )
In:
A: an array of e.g. 1000 observations x 20 variables, 1000 rows x 20 colum...
What's the state of the art in email validation for Rails?
...del:
class TestUser
include Mongoid::Document
field :email, type: String
validates :email, email: true
end
Your validator (goes in app/validators/email_validator.rb)
class EmailValidator < ActiveModel::EachValidator
EMAIL_ADDRESS_QTEXT = Regexp.new '[^\\x0d\\x22\\x5c\\x8...
fs: how do I locate a parent folder?
...
why? just generally why? can someone please explain?
– eyurdakul
May 16 '17 at 15:12
...
Using NSPredicate to filter an NSArray based on NSDictionary keys
...ase- and diacritic-insensitive like.”) For a complete description of the string syntax and a list of all the operators available, see Predicate Format String Syntax.
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How to add a WiX custom action that happens only on uninstall (via MSI)?
I would like to modify an MSI installer (created through WiX ) to delete an entire directory on uninstall.
6 Answers
...
The server committed a protocol violation. Section=ResponseStatusLine ERROR
I have created a program, tried to post a string on a site and I get this error:
17 Answers
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Is it possible to use 'else' in a list comprehension? [duplicate]
...
woops, i meant to ask about the join method vs. += on a string.
– Josh
Jun 1 '10 at 17:54
Interesti...
How to check for the type of a template parameter?
...ioned the main logic can be done in a different function, which accepts an extra flag to indicate the type, and this specialized declaration can just set the flag accordingly and directly pass on all the other arguments without touching anything. So if 10 different classes need to be handled, it is ...