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What are copy elision and return value optimization?
...to a copy or move constructor is elided, that constructor must still exist and must be accessible. This ensures that copy elision does not allow copying objects which are not normally copyable, e.g. because they have a private or deleted copy/move constructor.
C++17: As of C++17, Copy Elision is gua...
Is returning by rvalue reference more efficient?
...ptimization). Now, you can do the following
Beta_ab ab = others.toAB();
And it will move construct the temporary into ab, or do RVO to omit doing a move or copy altogether. I recommend you to read BoostCon09 Rvalue References 101 which explains the matter, and how (N)RVO happens to interact with ...
Can someone explain the “debounce” function in Javascript
...ew anonymous function
return function() {
// reference the context and args for the setTimeout function
var context = this,
args = arguments;
// Should the function be called now? If immediate is true
// and not already in a timeout then the answer is: Yes
var ...
Android: When should I use a Handler() and when should I use a Thread?
...gic that uses the network, or for whatever reason,
Starting a new Thread and running it works fine.
Creating a Handler and running it works as well.
What's the difference? When should I use each one?
What are the advantages / reasons to use a Handler and not a Thread ?
...
Using pre-compiled headers with CMake
... for pre-compiled headers in CMake. They all seem a bit all-over the place and everyone has their own way of doing it. What is the best way of doing it currently?
...
Nullable types and the ternary operator: why is `? 10 : null` forbidden? [duplicate]
...
The compiler first tries to evaluate the right-hand expression:
GetBoolValue() ? 10 : null
The 10 is an int literal (not int?) and null is, well, null. There's no implicit conversion between those two hence the error message.
If you change the right-hand expression to ...
How to convert String to Long in Kotlin?
...
1. string.toLong()
Parses the string as a [Long] number and returns the result.
@throws NumberFormatException if the string is not a valid
representation of a number.
2. string.toLongOrNull()
Parses the string as a [Long] number and returns the result or null
if the...
How do I run multiple background commands in bash in a single line?
I normally run multiple commands with something like this:
8 Answers
8
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Why doesn't the JVM cache JIT compiled code?
...ower advanced programmers to optimize their application's performance when and where they just know the patterns are not changing, under their responsibility. Why not?!
– Alex Martelli
Jan 2 '10 at 22:58
...
Expand div to max width when float:left is set
...
Yes, you are right and I agree. However I think Flo only mentioned this, because he thinks they are both! needed to get the desired layout and therefore my alternative solution.
– merkuro
Jun 19 '09 at 13:...