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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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Scrollview vertical and horizontal in android
I'm really tired looking for a solution for vertical and horizontal Scrollview.
11 Answers
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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...
How do I enter RGB values into Interface Builder?
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When you choose "Save for Web & Devices" from Photoshop, uncheck the "Convert to sRGB" box.
In Xcode, click the colorspace popup in the color picker and choose "Generic RGB", then enter the red, green and blue values from Photoshop, NOT THE HEX VALUE as this reverts back to the sRGB colors...
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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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)
{
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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...
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...
Union of dict objects in Python [duplicate]
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Why converting to list() ? def union2(dict1, dict2): return dict(dict1.items() + dict2.items())
– kinORnirvana
May 22 '17 at 14:48
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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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