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Why is reading lines from stdin much slower in C++ than Python?
...r thread default, IIRC. 1MB isn't that much of an issue for a program that transforms input with relatively shallow stack depth. More importantly, though, std::cin will trash the stack if the buffer goes out of scope.
– SEK
Jan 14 '14 at 9:28
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Performance of foreach, array_map with lambda and array_map with static function
... difference (if there is any) between these three approaches, both used to transform an array to another array?
3 Answers
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eval command in Bash and its typical uses
...ich is what one would use, unless it was necessary to perform some kind of transformation (e.g. filtering or substitution) on the content of the imported script.
I rarely have needed eval, but I have found it useful to read or write variables whose names were contained in strings assigned to other ...
Multiple INSERT statements vs. single INSERT with multiple VALUES
...e!CSQLSource::FCompWrapper() + 0x922be bytes
sqlservr.exe!CSQLSource::Transform() + 0x120431 bytes
sqlservr.exe!CSQLSource::Compile() + 0x2ff bytes
So going off the names in the stack trace it appears to spend a lot of time comparing strings.
This KB article indicates that DeriveNorm...
Loop through an array in JavaScript
...(sometimes a.k.a. collect, but very different from apply) is expressly for transforming each element of an array into a corresponding result; it's a 1-to-1 mapping, hence the name. It's part of a whole family of operations that include reduce (which produces a single result from the whole array) an...
Is std::vector so much slower than plain arrays?
...zation. The latter usually happens on stages where parse result is already transformed numerous times to a much more low-level representation.
– Pavel Minaev
Sep 8 '10 at 4:37
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原子vector的一种实现源码(atomic-vector) - C/C++ - 清泛网 - 专注C/C++及内核技术
原子vector的一种实现源码(atomic-vector)atomic-vector来自Facebook的一种实现，源码如下： * +----------------------------------------------------------------------+ | HipHop for PHP 来自Facebook的一种实现，源码如下：
/*
+--------------------...
How to generate JAXB classes from XSD?
...nputStream;
import java.net.URL;
import javax.xml.bind.*;
import javax.xml.transform.stream.StreamSource;
import org.w3._2005.atom.FeedType;
public class Demo {
public static void main(String[] args) throws Exception {
JAXBContext jc = JAXBContext.newInstance("org.w3._2005.atom");
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What exactly is a C pointer if not a memory address?
...legal per the language standard so long as the implementation knows how to transform those numbers into addresses and how to do pointer arithmetic with those numbers and all other things required by the standard.
– Alexey Frunze
Mar 1 '13 at 6:12
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Why does SIGPIPE exist?
... default behavior for pure "filter" programs that continuously read input, transform it somehow, and write output. Without SIGPIPE, unless these programs explicitly handle write errors and immediately exit (which might not be the desired behavior for all write errors, anyway), they will continue run...