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Is there a performance difference between i++ and ++i in C++?
... this->data += 1;
return *this;
}
Foo Foo::operator++(int ignored_dummy_value) // called for i++
{
Foo tmp(*this); // variable "tmp" cannot be optimized away by the compiler
++(*this);
return tmp;
}
Since the compiler isn't generating code, but just calling an operator++ ...
Can C++ code be valid in both C++03 and C++11 but do different things?
...c"
const char* s = u8"def"; // Previously "abcdef", now "def"
and
#define _x "there"
"hello "_x // Previously "hello there", now a user defined string literal
Type conversions of 0
In C++11, only literals are integer null pointer constants:
void f(void *); // #1
void f(...); // #2
template<int ...
What is the use of “assert” in Python?
...
Ricardo Stuven
4,21922 gold badges3232 silver badges3636 bronze badges
answered Feb 28 '11 at 14:10
Neil VassNeil Vass
...
How to run a program without an operating system?
...ttom = .;
. = . + 0x1000;
__stack_top = .;
}
run
set -eux
as -ggdb3 --32 -o entry.o entry.S
gcc -c -ggdb3 -m16 -ffreestanding -fno-PIE -nostartfiles -nostdlib -o main.o -std=c99 main.c
ld -m elf_i386 -o main.elf -T linker.ld entry.o main.o
objcopy -O binary main.elf main.img
qemu-system-x86_64 ...
Best way to select random rows PostgreSQL
...ery:
SELECT count(*) AS ct -- optional
, min(id) AS min_id
, max(id) AS max_id
, max(id) - min(id) AS id_span
FROM big;
The only possibly expensive part is the count(*) (for huge tables). Given above specifications, you don't need it. An estimate will do just fine,...
How can I get the latest JRE / JDK as a zip file rather than EXE or MSI installer? [closed]
...the following commands in cmd.exe:
cd C:\JDK\.rsrc\1033\JAVA_CAB10
extrac32 111
Unpack C:\JDK\.rsrc\1033\JAVA_CAB10\tools.zip with 7-zip
Execute the following commands in cmd.exe:
cd C:\JDK\.rsrc\1033\JAVA_CAB10\tools\
for /r %x in (*.pack) do .\bin\unpack200 -r "%x" "%~dx%~px%~nx.jar" (this wi...
JavaScript: clone a function
...nction.prototype.clone = function() {
var cloneObj = this;
if(this.__isClone) {
cloneObj = this.__clonedFrom;
}
var temp = function() { return cloneObj.apply(this, arguments); };
for(var key in this) {
temp[key] = this[key];
}
temp.__isClone = true;
te...
How to use MDC with thread pools?
...ng setups.
– jlevy
Aug 25 '16 at 19:32
1
Just for completeness: if you are using Spring's ThreadP...
Best approach for designing F# libraries for use from both F# and C#
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
How to correctly implement custom iterators and const_iterators?
...ustom container class for which I'd like to write the iterator and const_iterator classes.
6 Answers
...