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Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)
...t key.
Because each pizza must have exactly one of each topping type, we know that (Pizza, Topping Type) is a candidate key. We also know intuitively that a given topping cannot belong to different types simultaneously. So (Pizza, Topping) must be unique and therefore is also a candidate key. So...
How many and which are the uses of “const” in C++?
...ect remain the same. Once one of the object changes data, you however need now two versions: One for the original, and one for the copy. That is, you copy on a write to either object, so that they now both have their own version.
Using code:
int main() {
string const a = "1234";
string co...
How to use Git for Unity3D source control?
...for Git called Git LFS that directly deals with the below problem. You can now easily and efficiently version large binary files!
Git can work fine with 3D games out of the box. However the main caveat here is that versioning large (>5 MB) media files can be a problem over the long term as your...
Locking a file in Python
...ired.")
with open("myfile.txt"):
# work with the file as it is now locked
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What are C++ functors and their uses?
...
int operator()(int y) const { return x + y; }
private:
int x;
};
// Now you can use it like this:
add_x add42(42); // create an instance of the functor class
int i = add42(8); // and "call" it
assert(i == 50); // and it added 42 to its argument
std::vector<int> in; // assume this conta...
Center a popup window on screen?
...lso work on windows that aren't maxed out to the screen's width and height now thanks to @Frost!
If you're on dual monitor, the window will center horizontally, but not vertically... use this function to account for that.
const popupCenter = ({url, title, w, h}) => {
// Fixes dual-screen po...
Sending multipart/formdata with jQuery.ajax
...)[0].files, function(i, file) {
data.append('file-'+i, file);
});
So now you have a FormData object, ready to be sent along with the XMLHttpRequest.
jQuery.ajax({
url: 'php/upload.php',
data: data,
cache: false,
contentType: false,
processData: false,
method: 'POST',
...
AngularJS : Initialize service with asynchronous data
...troller('MainCtrl', function($scope,MyService) {
console.log('Promise is now resolved: '+MyService.doStuff().data)
$scope.data = MyService.doStuff();
});
I've made an example at plnkr: http://plnkr.co/edit/GKg21XH0RwCMEQGUdZKH?p=preview
...
Ruby: Can I write multi-line string with no concatenation?
...
In ruby 2.0 you can now just use %
For example:
SQL = %{
SELECT user, name
FROM users
WHERE users.id = #{var}
LIMIT #{var2}
}
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Not able to type in textfield in iphone simulator using Mac Keyboard?
...me once. Then keyboard stopped working for me again not too long after and now this doesn't work. (Simulator v10.0, Xcode 9.2)
– Ryan H.
Jan 8 '18 at 15:35
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