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Git update submodules recursively
...submodule update --init --recursive
Note: in some older versions of Git, if you use the --init option, already-initialized submodules may not be updated. In that case, you should also run the command without --init option.
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Is the “struct hack” technically undefined behavior?
...
As the C FAQ says:
It's not clear if it's legal or portable, but it is rather popular.
and:
... an official interpretation has deemed that it is not strictly conforming with the C Standard, although it does seem to work under all known implementations. ...
Converting an int to std::string
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std::to_string() does not work in MinGW, if anyone cares.
– Archie
Nov 9 '15 at 8:55
3
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Find the day of a week
...dnesday", "Thursday", "Friday", "Saturday"))[weekdays(as.Date(df$date))]. If you don't like the names, you could wrap unname() around it.
– GSee
Jun 4 '14 at 22:21
6
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ModelState.AddModelError - How can I add an error that isn't for a property?
I am checking my database in Create(FooViewModel fvm){...} to see if the fvm.prop1 and fvm.prop2 already exist in that combination; if so, I want to add an error to the modelstate, then return the whole view. I tried:
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Prevent segue in prepareForSegue method?
...ter:
You have to implement the method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
In your view controller. You do your validation there, and if it's OK then return YES; if it's not then return NO; and the prepareForSegue is not called.
Note that this metho...
How to split() a delimited string to a List
...ng> list = array.ToList();
Or change your code to not rely on the specific implementation:
IList<string> list = array; // string[] implements IList<string>
share
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improve this an...
How to fix getImageData() error The canvas has been tainted by cross-origin data?
... this by simply setting:
img.crossOrigin = "Anonymous";
This only works if the remote server sets the following header appropriately:
Access-Control-Allow-Origin "*"
The Dropbox file chooser when using the "direct link" option is a great example of this. I use it on oddprints.com to hoover up ...
How to resize an image with OpenCV2.0 and Python2.6
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If you wish to use CV2, you need to use the resize function.
For example, this will resize both axes by half:
small = cv2.resize(image, (0,0), fx=0.5, fy=0.5)
and this will resize the image to have 100 cols (width) and 5...
How to install psycopg2 with “pip” on Python?
...r for e.g. Python 3.8.
Python 21
sudo apt install libpq-dev python-dev
If that's not enough, try
sudo apt install build-essential
or
sudo apt install postgresql-server-dev-all
as well before installing psycopg2 again.
CentOS 6
See Banjer's answer
1 Really? It's 2020
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