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Is it better to use std::memcpy() or std::copy() in terms to performance?
...py will have a slight, almost imperceptible performance loss. I just did a test and found that to be untrue: I did notice a performance difference. However, the winner was std::copy.
I wrote a C++ SHA-2 implementation. In my test, I hash 5 strings using all four SHA-2 versions (224, 256, 384, 512),...
Constants in Objective-C
...e of using string constants instead of #define'd constants is that you can test for equality using pointer comparison (stringInstance == MyFirstConstant) which is much faster than string comparison ([stringInstance isEqualToString:MyFirstConstant]) (and easier to read, IMO).
...
Convert string to integer type in Go?
...
Here are three ways to parse strings into integers, from fastest runtime to slowest:
strconv.ParseInt(...) fastest
strconv.Atoi(...) still very fast
fmt.Sscanf(...) not terribly fast but most flexible
Here's a benchmark that shows usage and example timing for each function:
packa...
scopes with lambda and arguments in Rails 4 style?
...where(id: id) }
But when I was reviewing my code using Codacy I found it alerting me about this syntax
Use the `lambda` method for multiline lambdas.
I changed it to be and it working well
scope :find_lazy, lambda {|id|
where(id: id)
}
...
How to [recursively] Zip a directory in PHP?
... to be created..
* You can specify the path too */
$obj = new Archive_Zip('test.zip');
/**
* create a file array of Files to be Added in Zip
*/
$files = array('black.gif',
'blue.gif',
);
/**
* creating zip file..if success do something else do something...
* if Error in file creation ..it is either...
How to allocate aligned memory only using the standard library?
I just finished a test as part of a job interview, and one question stumped me, even using Google for reference. I'd like to see what the StackOverflow crew can do with it:
...
UCenter实现各系统通信的原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的api/uc.php传递数据）
可以在uc应用目录下新建一个名为test.php的文件，来模拟登录成功，请求uc_server通知其它应用。文件内容为：
< ?php
include_once "config.inc.php";
include_once "./uc_client/client.php";
echo uc_user_synlogin(1);
echo "<pre>";...
how to return index of a sorted list? [duplicate]
... 0, 1, 3, 4])
If not available, taken from this question, this is the fastest method:
>>> vals = [2,3,1,4,5]
>>> sorted(range(len(vals)), key=vals.__getitem__)
[2, 0, 1, 3, 4]
share
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...
How do I get the path to the current script with Node.js?
...ory is a very different thing. If you run something like cd /foo; node bar/test.js, current directory would be /foo, but the script is located in /foo/bar/test.js.
– rjmunro
Jul 5 '18 at 11:20
...
SQL Server Insert if not exists
...ill sometimes fail, because a second connection can pass the IF NOT EXISTS test before the first connection executes the INSERT, i.e. a race condition. See stackoverflow.com/a/3791506/1836776 for a good answer on why even wrapping in a transaction doesn't solve this.
...