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Breaking out of a nested loop
... also place the loops into a method (or an anon-method) and use return to exit back to the main code.
// goto
for (int i = 0; i < 100; i++)
{
for (int j = 0; j < 100; j++)
{
goto Foo; // yeuck!
}
}
Foo:
Console.WriteLine("Hi");
vs:
//...
Version number comparison in Python
...
def mycmp(version1, version2):
def normalize(v):
return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]
return cmp(normalize(version1), normalize(version2))
This is the same approach as Pär Wieslander, but a bit more compact:
Here are some tests, thanks to "How to compar...
How can I truncate a double to only two decimal places in Java?
For example I have the variable 3.545555555, which I would want to truncate to just 3.54.
15 Answers
...
how to exclude null values in array_agg like in string_agg using postgres?
...s a null value, that null is also taken as a name in the aggregate. For example :
8 Answers
...
How to explicitly discard an out argument?
...hem.
public void PrintCoordinates(Point p)
{
p.GetCoordinates(out int x, out int y);
WriteLine($"({x}, {y})");
}
public void PrintXCoordinate(Point p)
{
p.GetCoordinates(out int x, out _); // I only care about x
WriteLine($"{x}");
}
Source: https://blogs.msdn.microsoft.com/dotnet...
Properly removing an Integer from a List
...
Java always calls the method that best suits your argument. Auto boxing and implicit upcasting is only performed if there's no method which can be called without casting / auto boxing.
The List interface specifies two remove methods (please note the naming of the arguments):
remove(Object...
For i = 0, why is (i += i++) equal to 0?
...ersimplification):
int i = 0;
i = i + i; // i=0 because the ++ is a postfix operator and hasn't been executed
i + 1; // Note that you are discarding the calculation result
What actually happens is more involved than that - take a look at MSDN, 7.5.9 Postfix increment and decrement operators:
...
Error handling in C code
...ef'ed enum and use it in your lib. Don't just return ints or even worse, mix ints or different enumerations with return-codes.
provide a function that converts errors into something human readable. Can be simple. Just error-enum in, const char* out.
I know this idea makes multithreaded use a bit di...
std::function vs template
...er it can get when memory allocation is involved, I've changed the lambda expression to capture three floats. This makes the callable object too big to apply the small object optimization:
float a, b, c; // never mind the values
// ...
calc2([a,b,c](float arg){ return arg * 0.5f; });
For this ver...
Get screen width and height in Android
...tDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;
In a view you need to do something like this:
((Activity) getContext()).getWindowManager()
.getDefaultDisplay()
.getMetrics...