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What is the use of “assert” in Python?
...t True # nothing happens
>>> assert False
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AssertionError
Assertions can include an optional message, and you can disable them when running the interpreter.
To print a message if the assertion fails:
ass...
What is the difference between an Azure Web Site and an Azure Web Role
...pps (formerly Web Sites):
Ability to run elevated startup scripts to install apps, modify registry settings, install performance counters, fine-tune IIS, etc.
Ability to split an app up into tiers (maybe Web Role for front end, Worker Role for backend processing) and scale independently
Ability to...
PowerShell script to return versions of .NET Framework on a machine?
...t). It also outputs both Client and Full on 4.0 (if you have them both installed):
Get-ChildItem 'HKLM:\SOFTWARE\Microsoft\NET Framework Setup\NDP' -recurse |
Get-ItemProperty -name Version,Release -EA 0 |
Where { $_.PSChildName -match '^(?!S)\p{L}'} |
Select PSChildName, Version, Release
Based o...
PHP array_filter with arguments
...
As an alternative to @Charles's solution using closures, you can actually find an example in the comments on the documentation page. The idea is that you create an object with the desired state ($num) and the callback method (taking $i as an argument):
class LowerThanFilter {
private ...
PDO closing connection
...
close the connection, you need to destroy the object by ensuring that
all remaining references to it are deleted--you do this by assigning
NULL to the variable that holds the object. If you don't do this
explicitly, PHP will automatically close the connection when your
script ends.
Note...
How to find event listeners on a DOM node when debugging or from the JavaScript code?
...d A.com/js/jquery-ui-1.10.3.custom.js?_=1384831682813. Origin B.com is not allowed by Access-Control-Allow-Origin.
– hiway
Nov 19 '13 at 3:50
5
...
How to dynamically load a Python class
...hing like this won't work:
__import__('foo.bar.baz.qux')
You'd have to call the above function like so:
my_import('foo.bar.baz.qux')
Or in the case of your example:
klass = my_import('my_package.my_module.my_class')
some_object = klass()
EDIT: I was a bit off on this. What you're basicall...
How do I get the opposite (negation) of a Boolean in Python?
...ful if you want to use a function that requires a predicate-function or a callback.
For example map or filter:
>>> lst = [True, False, True, False]
>>> list(map(operator.not_, lst))
[False, True, False, True]
>>> lst = [True, False, True, False]
>>> list(filter...
What is object slicing?
...uestions/274626#274636 for an example of how slicing occurs during method calls (which underscores the danger a little better than the plain assignment example).
– Blair Conrad
Nov 8 '08 at 13:53
...
How do you tell if a string contains another string in POSIX sh?
...x, or it will not work in general. For example, try [[ test =~ "test.*" ]] vs. [[ test =~ test.* ]].
– l0b0
Jan 11 '12 at 8:01
...