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Why are preprocessor macros evil and what are the alternatives?
... then
if (something) safe_divide(b, a, x);
else printf("Something is not set...");
It actually becomes completely the wrong thing....
Replacement: real functions.
3) Macros have no namespace
If we have a macro:
#define begin() x = 0
and we have some code in C++ that uses begin:
std::vec...
Validate phone number with JavaScript
I found this code in some website, and it works perfectly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
...
Returning from a finally block in Java
... editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
...
not:first-child selector
...miting the scope use the default value for each CSS attribute that you are setting.
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App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
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应用场景参考
物联网设备控制：通过WIFI UDP通信，可以实现对物联网设备的远程控制和数据采集。
实时数据传输：在需要实时数据传输的应用中，如实时监控、实时游戏等，UDP通信可以提供高效的传输方式。...
HTML5 dragleave fired when hovering a child element
...this).removeClass('red');
}
}
});
Note: In the drop event, reset counter to zero, and clear the added class.
You can run it here
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Git stash pop- needs merge, unable to refresh index
I can't pop my stash because I merged a branch which apparently conflicts with my stash and now my stash is seemingly unable to be popped.
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In which order should floats be added to get the most precise result?
... add the two numbers with the lowest magnitude and reinsert the sum in the set. (Well, probably a merge sort would work best here. You could use the portion of the array containing the previously summed numbers as a working area for the partial sums.)
– Neil
Ju...
Elegant way to combine multiple collections of elements?
Say I have an arbitrary number of collections, each containing objects of the same type (for example, List<int> foo and List<int> bar ). If these collections were themselves in a collection (e.g., of type List<List<int>> , I could use SelectMany to combine them all into...
Getting the array length of a 2D array in Java
I need to get the length of a 2D array for both the row and column. I’ve successfully done this, using the following code:
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