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LINQ Aggregate algorithm explained
...regate is that it performs an operation on each element of the list taking into account the operations that have gone before. That is to say it performs the action on the first and second element and carries the result forward. Then it operates on the previous result and the third element and carrie...
PHP String to Float
...1,5h tracking down an issue caused by different locales causing (float) to convert on the first server to "," and on the second to ","
– Dr. Gianluigi Zane Zanettini
Jan 22 '16 at 15:36
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C++11 reverse range-based for-loop
...nclude <iostream>
#include <boost/range/adaptor/reversed.hpp>
int main()
{
std::list<int> x { 2, 3, 5, 7, 11, 13, 17, 19 };
for (auto i : boost::adaptors::reverse(x))
std::cout << i << '\n';
for (auto i : x)
std::cout << i << '\n...
“inconsistent use of tabs and spaces in indentation”
...s and spaces in indentation error and select:
view > indentation > convert indentation to spaces
which resolved the issue for me.
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When to use extern in C++
I'm reading "Think in C++" and it just introduced the extern declaration. For example:
4 Answers
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How can I make an EXE file from a Python program? [duplicate]
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Auto PY to EXE - A .py to .exe converter using a simple graphical interface built using Eel and PyInstaller in Python.
py2exe is probably what you want, but it only works on Windows.
PyInstaller works on Windows and Linux.
Py2app works on the Mac.
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Comparing two collections for equality irrespective of the order of items in them
... comparer. It is more complete than existing answers, since it takes nulls into account, implements IEqualityComparer and has some efficiency and edge case checks. plus, it's Microsoft :)
public class MultiSetComparer<T> : IEqualityComparer<IEnumerable<T>>
{
private readonly I...
How to define “type disjunction” (union types)?
...declare a class with the types you wish to accept as below:
class StringOrInt[T]
object StringOrInt {
implicit object IntWitness extends StringOrInt[Int]
implicit object StringWitness extends StringOrInt[String]
}
Next, declare foo like this:
object Bar {
def foo[T: StringOrInt](x: T) = x ...
How to get screen dimensions as pixels in Android
... use getSize:
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
int width = size.x;
int height = size.y;
If you're not in an Activity you can get the default Display via WINDOW_SERVICE:
WindowManager wm = (WindowManager) context.getSystemS...
Why is division in Ruby returning an integer instead of decimal value?
...t; 1.8
This also works if your values are variables instead of literals. Converting one value to a float is sufficient to coerce the whole expression to floating point arithmetic.
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