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How do I calculate square root in Python?
...tance, x(0) in the second.
So it's not wrong, it's the right answer to a different question.
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Is there a Python equivalent of the C# null-coalescing operator?
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other = s or "some default value"
Ok, it must be clarified how the or operator works. It is a boolean operator, so it works in a boolean context. If the values are not boolean, they are converted to boolean for the purposes of the operator.
Note that the or operator does not r...
Set the value of a variable with the result of a command in a Windows batch file
...t foobar=%%a
But, I instead suggest using Cygwin on your Windows system if you are used to Unix-type scripting.
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Coding Practices which enable the compiler/optimizer to make a faster program
...his can be a huge help for getting around aliasing slowdowns. For example, if your code looks like
void DoSomething(const Foo& foo1, const Foo* foo2, int numFoo, Foo& barOut)
{
for (int i=0; i<numFoo, i++)
{
barOut.munge(foo1, foo2[i]);
}
}
the compiler doesn't kno...
Keyboard Interrupts with python's multiprocessing Pool
...lmost certainly interrupt a condition wait.
Note that this doesn't happen if a timeout is specified; cond.wait(1) will receive the interrupt immediately. So, a workaround is to specify a timeout. To do that, replace
results = pool.map(slowly_square, range(40))
with
results = pool.map_...
Is there any way to ignore INSTALL_FAILED_VERSION_DOWNGRADE on application install with the Android
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And it seems to be documented now! Just not that you have to use -r -d, -rd will not work
– plaisthos
Jan 8 '16 at 12:44
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使用std::string作为std::map的key出错解决 - C/C++ - 清泛网 - 专注C/C++及内核技术
...0\vc\include\xstddef(180): error C2784: “bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)”: 未能从“const std::string”为“const std::_Tree<_Traits> &”推导 模板 参数
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(2245...
Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
... comment which had been ignored by all users pointing to the missing lib. Now, many months later, the comment has been changed to an answer. However, when I answered this question by msyself I intended to help other people by directly providing the solution. This should not be forgotten and so far ...
How to assert two list contain the same elements in Python? [duplicate]
...simple example which compares two lists having the same elements but in a different order.
using assertCountEqual the test will succeed
using assertListEqual the test will fail due to the order difference of the two lists
Here a little example script.
import unittest
class TestListElements(un...
jQuery get value of selected radio button
The problem statement is simple. I need to see if user has selected a radio button from a radio group. Every radio button in the group share same id.
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