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enum - getting value of enum on string conversion
...bject. Use the .value attribute if you wanted just to print that:
print(D.m>x m>.value)
See the Programmatic access to enumeration members and their attributes section:
If you have an enum member and need its name or value:
>>>
>>> member = Color.red
>>> member.name
're...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
...uake III source code which calculates the inverse square root of a float, 4m>x m> faster than regular (float)(1.0/sqrt(m>x m>)) , including a strange 0m>x m>5f3759df constant. See the code below. Can someone em>x m>plain line by line what em>x m>actly is going on here and why this works so much faster than the regular im...
How to get values from IGrouping
...gt;();
IEnumerable<IGrouping<int, smth>> groups = list.GroupBy(m>x m> => m>x m>.id);
IEnumerable<smth> smths = groups.SelectMany(group => group);
List<smth> newList = smths.ToList();
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How to convert a boolean array to an int array
...d to int in many cases, so you can add it to int arrays without having to em>x m>plicitly convert it:
>>> m>x m>
array([ True, False, True], dtype=bool)
>>> m>x m> + [1, 2, 3]
array([2, 2, 4])
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Why is there an injected class name?
...
The injected class name means that m>X m> is declared as a member of m>X m>, so that name lookup inside m>X m> always finds the current class, not another m>X m> that might be declared at the same enclosing scope, e.g.
void m>X m>() { }
class m>X m> {
public:
static m>X m> create() { return ...
Reordering of commits
...story should look like this:
c - [a+d+e+g] - [b+f] (branchA)
/
--o-m>x m>-m>x m>-m>x m>-m>x m>-m>x m>-m>x m>-m>x m>-m>x m>-m>x m>-m>x m> (master)
Now, let's grab the newly-squashed commit b+f for branchB.
git checkout branchB
git cherry-pick branchA # cherry-pick one commit, the tip of branchA
And the same for a+d+e+g for master:
git...
Can't use modulus on doubles?
... for the fmod() function.
#include <cmath>
int main()
{
double m>x m> = 6.3;
double y = 2.0;
double z = std::fmod(m>x m>,y);
}
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Is there a simple way to convert C++ enum to string?
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Nem>x m>t
48
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Find first element in a sequence that matches a predicate
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To find first element in a sequence seq that matches a predicate:
nem>x m>t(m>x m> for m>x m> in seq if predicate(m>x m>))
Or (itertools.ifilter on Python 2):
nem>x m>t(filter(predicate, seq))
It raises StopIteration if there is none.
To return None if there is no such element:
nem>x m>t((m>x m> for m>x m> in seq if predic...
Difference between `mod` and `rem` in Haskell
What em>x m>actly is the difference between mod and rem in Haskell?
4 Answers
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