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What is an invariant?
The word seems to get used in a number of contexts. The best I can figure is that they mean a variable that can't change. Isn't that what constants/finals (darn you Java!) are for?
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Change text color based on brightness of the covered background area?
I've thought about the following for a while already, so now I want to know your opinions, possible solutions, and so on.
8...
Can promises have multiple arguments to onFulfilled?
...m following the spec here and I'm not sure whether it allows onFulfilled to be called with multiple arguments. For example:
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Is it possible for a unit test to assert that a method calls sys.exit()
...our_method()
Instances of SystemExit have an attribute code which is set to the proposed exit status, and the context manager returned by assertRaises has the caught exception instance as exception, so checking the exit status is easy:
with self.assertRaises(SystemExit) as cm:
your_method()
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How do I handle the window close event in Tkinter?
How do I handle the window close event (user clicking the 'X' button) in a Python Tkinter program?
6 Answers
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How to initialize an array in Java?
...e above is not correct (syntax error). It means you are assigning an array to data[10] which can hold just an element.
If you want to initialize an array, try using Array Initializer:
int[] data = {10,20,30,40,50,60,71,80,90,91};
// or
int[] data;
data = new int[] {10,20,30,40,50,60,71,80,90,91}...
remove objects from array by object property
...rrayOfObjects.length; i++) {
var obj = arrayOfObjects[i];
if (listToDelete.indexOf(obj.id) !== -1) {
arrayOfObjects.splice(i, 1);
}
}
All you need to do to fix the bug is decrement i for the next time around, then (and looping backwards is also an option):
for (var i = 0; i &...
JQuery - $ is not defined
...one of three things:
Your JavaScript file is not being properly loaded into your page
You have a botched version of jQuery. This could happen because someone edited the core file, or a plugin may have overwritten the $ variable.
You have JavaScript running before the page is fully loaded, and as ...
How to get distinct values from an array of objects in JavaScript?
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how we could also print out the total number of people that have same age?
– user1788736
Mar 20 '19 at 1:43
add a comment
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Get list of all routes defined in the Flask app
...iew functions. Their URLs are defined with the @app.route('/...') decorator. Is there a way to get a list of all the routes that have been declared throughout my app? Perhaps there is some method I can call on the app object?
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