大约有 43,000 项符合查询结果（耗时：0.0373秒） [XML]
What are the differences between Perl, Python, AWK and sed? [closed]
...th an ⁿ of 1,000,000 it runs in less than two seconds. time perl -E '$x=1_000_000;$_="a"x$x;$m=("a??"x$x).("a"x$x);say $_=~$m' If you run the naive one it takes more than two seconds for an ⁿ of just 25. The thing you have to realize is Perl has more regex features than those faster ones includi...
How can I generate Unix timestamps?
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@ĽubomírMlích On a SmartOS host (SunOS 5.11 joyent_20171026T003127Z), I've both /usr/bin/date +%s and /usr/xpg4/bin/date +%s` working. Combined with the POSIX.2 recommendation, I think this works on all Solaris too.
– Dereckson
Nov 5 '1...
Display names of all constraints for a table in Oracle SQL
...
You need to query the data dictionary, specifically the USER_CONS_COLUMNS view to see the table columns and corresponding constraints:
SELECT *
FROM user_cons_columns
WHERE table_name = '<your table name>';
FYI, unless you specifically created your table with a lower case ...
Java FileReader encoding issue
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@NobleUplift: the safest bet is StandardCharsets.UTF_8, there's no chance of mistyping there ;-) But yes, if you go with string "UTF8" would be correct (although I seem to remember that it will accept both ways).
– Joachim Sauer
Nov 13 '1...
How to POST JSON Data With PHP cURL?
...y -- but even if it were correct, you would not be able to test using print_r($_POST) (read why here). Instead, on your second page, you can nab the incoming request using file_get_contents("php://input"), which will contain the POSTed json. To view the received data in a more readable format, try...
Calling a function within a Class method?
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example 1
class TestClass{
public function __call($name,$arg){
call_user_func($name,$arg);
}
}
class test {
public function newTest(){
function bigTest(){
echo 'Big Test Here';
}
function smallTest(){
e...
Exception messages in English?
...ionLogger class looks something like:
class ExceptionLogger
{
Exception _ex;
public ExceptionLogger(Exception ex)
{
_ex = ex;
}
public void DoLog()
{
Console.WriteLine(_ex.ToString()); //Will display en-US message
}
}
However, as Joe correctly points out in a comment on an...
How do I set a ViewModel on a window in XAML using DataContext property?
...MarkupExtension, IValueConverter where T : class, new() { private static T _converter; public override object ProvideValue(IServiceProvider serviceProvider) { return _converter ?? (_converter = new T()); } }
– Whazz
May 19 '18 at 22:30
...
Add single element to array in numpy
...swered Sep 7 '11 at 11:15
reader_1000reader_1000
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Why have header files and .cpp files? [closed]
...e the main reason for existence of HPP files is explained above.
#ifndef B_HPP_
#define B_HPP_
// The declarations in the B.hpp file
#endif // B_HPP_
or even simpler
#pragma once
// The declarations in the B.hpp file
...