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what is the difference between ?:, ?! and ?= in regex?
I searched for the meaning of these expressions but couldn't understand the exact difference between them.
This is what they say:
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Ignore python multiple return value
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One common convention is to use a "_" as a variable name for the elements of the tuple you wish to ignore. For instance:
def f():
return 1, 2, 3
_, _, x = f()
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How to use enums as flags in C++?
Treating enum s as flags works nicely in C# via the [Flags] attribute, but what's the best way to do this in C++?
22 Ans...
Is it possible to have multiple styles inside a TextView?
Is it possible to set multiple styles for different pieces of text inside a TextView?
18 Answers
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How to check if one of the following items is in a list?
...ing to find a short way to see if any of the following items is in a list, but my first attempt does not work. Besides writing a function to accomplish this, is the any short way to check if one of multiple items is in a list.
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Operator overloading in Java
Please can you tell me if it is possible to overload operators in Java? If it is used anywhere in Java could you please tell me about it.
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How to check if a number is between two values?
In JavaScript, I'm telling the browser to do something if the window size is greater than 500px. I do it like so:
7 Answers...
How To Get IPython Notebook To Run Python 3?
...on Notebook to run Python 3 instead of 2 on my MAC 10.9, I did the following steps
$ sudo pip3 install ipython[all]
Then
$ ipython3 notebook
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Python using enumerate inside list comprehension
...r way, the result that gets returned is as expected:
> [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')]
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How does variable assignment work in JavaScript?
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In the first example, you are setting a property of an existing object. In the second example, you are assigning a brand new object.
a = b = {};
a and b are now pointers to the same object. So when you do:
a.foo = 'bar';
It sets b.foo as well since a and b point to the same object....