大约有 48,000 项符合查询结果（耗时：0.0604秒） [XML]
Cron and virtualenv
I am trying to run a Django management command from cron. I am using virtualenv to keep my project sandboxed.
9 Answers
...
What is meant by “managed” vs “unmanaged” resources in .NET?
...e your code thusly:
using (var connection = new SqlConnection("connection_string_here"))
{
// Code to use connection here
}
As this ensures that .Dispose() is called on the connection object, ensuring that any unmanaged resources are cleaned up.
...
When to use Task.Delay, when to use Thread.Sleep?
...at the difference with Thread.Sleep:
class Program
{
static void Main(string[] args)
{
Task delay = asyncTask();
syncCode();
delay.Wait();
Console.ReadLine();
}
static async Task asyncTask()
{
var sw = new Stopwatch();
sw.Start();...
xpath find if node exists
...using xpath in Java using count():
int numberofbodies = Integer.parseInt((String) xPath.evaluate("count(/html/body)", doc));
if( numberofbodies==0) {
// body node missing
}
share
|
improve thi...
RSpec: What is the difference between a feature and a request spec?
...would you recommend to use Rails paths (i.e visit users_path) or hardcoded strings (visit '/users')?. Personally, I prefer not to use any app internals in those kind of specs.
– tokland
Dec 3 '14 at 17:25
...
Assign same value to multiple variables at once?
...
actually means $a = ( $b = ( $c = $d ) )
PHP passes primitive types int, string, etc. by value and objects by reference by default.
That means
$c = 1234;
$a = $b = $c;
$c = 5678;
//$a and $b = 1234; $c = 5678;
$c = new Object();
$c->property = 1234;
$a = $b = $c;
$c->property = 5678;
// $...
differences in application/json and application/x-www-form-urlencoded
...e=ferret&color=purple
The content of the fields is encoded as a query string. The application/x-www-form-
urlencoded's name come from the previous url query parameter but the query parameters is
in where the body of request instead of url.
The whole form data is sent as a long query string.T...
What's the opposite of chr() in Ruby?
...
If String#ord didn't exist in 1.9, it does in 2.0:
"A".ord #=> 65
share
|
improve this answer
|
f...
How do I get the number of days between two dates in JavaScript?
...umber value (milliseconds since the start of 1970).
// new Date("dateString") is browser-dependent and discouraged, so we'll write
// a simple parse function for U.S. date format (which does no error checking)
function parseDate(str) {
var mdy = str.split('/');
return new Date(mdy[...
php: determine where function was called from
...p
function epic( $a, $b )
{
fail( $a . ' ' . $b );
}
function fail( $string )
{
$backtrace = debug_backtrace();
print_r( $backtrace );
}
epic( 'Hello', 'World' );
Output:
Array
(
[0] => Array
(
[file] => /Users/romac/Desktop/test.php
[line...