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How does Haskell printf work?
... uses the same technique, where the Testable class has an instance for the base case Bool, and a recursive one for functions which take arguments in the Arbitrary class.
class Testable a
instance Testable Bool
instance (Arbitrary x, Testable r) => Testable (x -> r)
...
LINQ to Entities only supports casting EDM primitive or enumeration types with IEntity interface
...
Perfect, it's great being able to perform Interface-based queries and still maintain the collection as IQueryable. A bit annoying however that there is basically no way of thinking up this fix, without knowing the inner workings of EF.
– Anders
...
Convert .pfx to .cer
...urse have this all on a single line.
If you need the certificate in ASCII/Base64 encoded PEM format, you can take extra steps to do so as documented elsewhere, such as here: https://superuser.com/questions/351548/windows-integrated-utility-to-convert-der-to-pem
If you need to export to a different...
How can I add a table of contents to a Jupyter / JupyterLab notebook?
...adings, collapse sections, and be used for navigation (see gif below for a demo). Install with the following command
jupyter labextension install @jupyterlab/toc
In the notebook as a cell
At the time being,
this can either be done manually as in Matt Dancho's answer,
or automatically via the...
What does “mro()” do?
...s we have single inheritance, __mro__ is just the tuple of: the class, its base, its base's base, and so on up to object (only works for new-style classes of course).
Now, with multiple inheritance...:
>>> class D(B, C): pass
...
>>> D.__mro__
(<class '__main__.D'>, <cl...
How to install and run phpize
...!
Alternate method(Optional):
To automatically install the phpize version based on the php version installed on your machine run the following command.
sudo apt-get install php-dev
This command will automatically detect the appropriate version of php installed and will install the matching phpiz...
method of iterating over sqlalchemy model's defined columns?
...not desirable.
But it is actually much easier because if you inherit from Base, you have a __table__ attribute, so that you can do:
for c in JobStatus.__table__.columns:
print c
for c in JobStatus.__table__.foreign_keys:
print c
See How to discover table properties from SQLAlchemy mappe...
jQuery.click() vs onClick
...ce.
I've done a test in Firefox 16.0 32-bit on Windows Server 2008 R2 / 7 64-bit
$('span'); // 6,604 operations per second
document.getElementsByTagName('span'); // 10,331,708 operations/sec
For click events, check Native Browser events vs jquery trigger or jQuery vs Native Click Event Binding.
...
What is the main difference between Inheritance and Polymorphism?
...a different way in between parent class and its sub classes, and call them based on situation are Polymorphism,. Am I correct?
– Muhammad Raihan Muhaimin
Jun 20 '13 at 16:55
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How to set ViewBag properties for all Views without using a base class for Controllers?
...iewBag in a global fashion by having all Controllers inherit from a common base controller.
8 Answers
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