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How can you use optional parameters in C#?
...nnot have public void SomeMethod(int b = 0, int a)
– Andrew Meservy
Feb 27 '19 at 19:24
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For i = 0, why is (i += i++) equal to 0?
...ation):
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:
The run-tim...
Can we have functions inside functions in C++?
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Modern C++ - Yes with lambdas!
In current versions of c++ (C++11, C++14, and C++17), you can have functions inside functions in the form of a lambda:
int main() {
// This declares a lambda, which can be called just like a function
auto print_message = [](std::string message)
{
...
C# Sortable collection which allows duplicate keys
...ts IComparable:
/// <summary>
/// Comparer for comparing two keys, handling equality as beeing greater
/// Use this Comparer e.g. with SortedLists or SortedDictionaries, that don't allow duplicate keys
/// </summary>
/// <typeparam name="TKey"></typeparam>
public class Dupli...
Is it possible for git-merge to ignore line-ending differences?
...r merge respecting eol, KDiff3 is better than DiffMerge (which will always convert LF into CRLF)
# KDiff3 will display eol choices (if Windows: CRLF, if Unix LF)
"C:/Program Files/KDiff3/kdiff3.exe" -m "$base" "$alocal" "$remote" -o "$result"
else
#there is not always a common ancestor: ...
EditText maxLines not working - user can still input more lines than set
...ds to the maximum height of the EditText, it controls the outer boundaries and not inner text lines.
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Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
...th a condition like data[c] & 0x80 or so that can be true for positive and negative values?). I had compilers make invalid optimisations (for example, a couple of years ago, I had an ICC (11.0, iirc) use signed-32-bit-int-to-double conversion in 1.0/n where n was an unsigned int. Was about twice...
Mod of negative number is melting my brain
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@RuudLenders: No. If x = -5 and m = 2, then r = x%m is -1, after which r+m is 1. The while loop is not needed. The point is that (as I wrote in the answer), x%m is always strictly greater than -m, so you need to add m at most once to make it positive.
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C compile error: “Variable-sized object may not be initialized”
...printf( "%d", boardAux[1][2] ) compiles fine. The compiler knows the sizes and knows in what position in memory the (1,2)-th element is. If you use dynamic allocation the array is uni-dimensional and you must perform the math yourself: printf("%d", boardAux[ 1*length + 2 ])
– D...
How to sum up elements of a C++ vector?
...tor.begin(); it != vector.end(); ++it)
sum_of_elems += *it;
Using a standard algorithm:
#include <numeric>
sum_of_elems = std::accumulate(vector.begin(), vector.end(), 0);
Important Note: The last argument's type is used not just for the initial value, but for the type of the resu...