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SQL Server IIF vs CASE
...ical sugar" as initially implemented.
CASE is portable across all SQL platforms whereas IIF is SQL SERVER 2012+ specific.
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How to print number with commas as thousands separators?
...
Locale unaware
'{:,}'.format(value) # For Python ≥2.7
f'{value:,}' # For Python ≥3.6
Locale aware
import locale
locale.setlocale(locale.LC_ALL, '') # Use '' for auto, or force e.g. to 'en_US.UTF-8'
'{:n}'.format(value) # For Python ≥...
CURL alternative in Python
...pt', 'application/json')
req.add_header("Content-type", "application/x-www-form-urlencoded")
req.add_header('Authorization', encodeUserData(u, p))
# make the request and print the results
res = urllib2.urlopen(req)
print res.read()
Furthermore if you wrap this in a script and run it from a termina...
Direct vs. Delegated - jQuery .on()
...t names in that first string.) .click() is just a shorthand for that first form.
– N3dst4
Aug 1 '13 at 7:45
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C++ “virtual” keyword for functions in derived classes. Is it necessary?
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struct Derived : Base {
virtual void some_func(int) override; // ill-formed - doesn't override a base class method
};
The compiler will issue a compile-time error and the programming error will be immediately obvious (perhaps the function in Derived should have taken a float as the argument)...
What is trunk, branch and tag in Subversion? [duplicate]
...using svn-git. It just doesn't like it if the branches are inappropriately formed. So the summary is, when it comes to tools like svn-git (which you might have to use in the future), they will be tuned to work against a repo that follows these conventions, and might refuse to function correctly/usef...
How to convert an NSTimeInterval (seconds) into minutes
...e iOS 8 or OS X 10.10, this just got a lot easier. The new NSDateComponentsFormatter class allows you to convert a given NSTimeInterval from its value in seconds to a localized string to show the user. For example:
Objective-C
NSTimeInterval interval = 326.4;
NSDateComponentsFormatter *componentF...
How to copy a file to a remote server in Python using SCP or SSH?
...nation])
sts = os.waitpid(p.pid, 0)
Where destination is probably of the form user@remotehost:remotepath. Thanks to
@Charles Duffy for pointing out the weakness in my original answer, which used a single string argument to specify the scp operation shell=True - that wouldn't handle whitespace in p...
How can I sharpen an image in OpenCV?
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You can sharpen an image using an unsharp mask. You can find more information about unsharp masking here. And here's a Python implementation using OpenCV:
import cv2 as cv
import numpy as np
def unsharp_mask(image, kernel_size=(5, 5), sigma=1.0, amount=1.0, threshold=0):
"""Return a sha...
Rename an environment with virtualenvwrapper
...ning that cpvirtualenv may not work properly due to some hard-coded path information. Here's the docs: virtualenvwrapper.readthedocs.org/en/latest/…
– modulitos
Jun 1 '15 at 8:44
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