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How should one use std::optional?
... //try to parse an int from the given string,
//and return "nothing" if you fail
}
The same thing might be accomplished with a reference argument instead (as in the following signature), but using std::optional makes the signature and usage nicer.
bool try_parse_int(std::string s, int& ...
Check whether an array is empty [duplicate]
... quick workaround you can do following:
$errors = array_filter($errors);
if (!empty($errors)) {
}
array_filter() function's default behavior will remove all values from array which are equal to null, 0, '' or false.
Otherwise in your particular case empty() construct will always return true if ...
Parse DateTime string in JavaScript
...
If you have date both TIME like this: "2014-05-20T16:43:56.71-06:00" var partesFecha = solicitud.CreatedDate.split("T")[0].split("-"); var createdDate = new Date(partesFecha[0], (partesFecha[1] - 1), partesFecha[2]); Fi...
Difference between Django's annotate and aggregate methods?
...think the comments on an eight-year-old question is the best place to ask. If you want to check when the queries run, then you can check connection.queries. Hint: check whether it's the book = q[0] or ` book.num_authors` that causes the query.
– Alasdair
Jul 31...
Accessing console and devtools of extension's background.js
...ndersen I've updated the picture. The triangle has been removed, that step now automatically happens when Developer mode is activated.
– Rob W
Oct 23 '14 at 9:28
...
Accessing UI (Main) Thread safely in WPF
...
@l46kok This can have different reasons (console app, hosting from winforms etc.). As @WolfgangZiegler said, you can use any UIElement for it. I just usually use Application.Current for it since it looks cleaner to me.
– Botz3...
Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
How to detect if Visual C++ Redistributable for Visual Studio 2012 is installed?
20 Answers
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Using the “animated circle” in an ImageView while loading stuff
..._LOADING_DIALOG);
fooThread = new FooThread(handler);
fooThread.start();
Now the thread does the work:
private class FooThread extends Thread {
Handler mHandler;
FooThread(Handler h) {
mHandler = h;
}
public void run() {
//Do all my work here....you might need a...
What's the fastest algorithm for sorting a linked list?
I'm curious if O(n log n) is the best a linked list can do.
13 Answers
13
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Differences between Ant and Maven [closed]
...hat they are used to automate the building of Java projects, but I do not know where to start from.
9 Answers
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