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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
... default value. Elements may be retrieved and exchanged with any
* valid index by many readers and writers concurrently, though the operations
* may be very slow if std::atomic<Value>::is_lock_free() == false.
*
* The only way to increase the size of an AtomicVector is with the ensureSize
...
Overcoming “Display forbidden by X-Frame-Options”
... with any string at all disables the SAMEORIGIN or DENY commands.
eg. for PHP, putting
<?php
header('X-Frame-Options: GOFORIT');
?>
at the top of your page will make browsers combine the two, which results in a header of
X-Frame-Options SAMEORIGIN, GOFORIT
...and allows you to loa...
Pass array to ajax request in $.ajax() [duplicate]
...o[1] = 'hello';
$.ajax({
type: "POST",
data: {info:info},
url: "index.php",
success: function(msg){
$('.answer').html(msg);
}
});
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What is Autoloading; How do you use spl_autoload, __autoload and spl_autoload_register?
...oad() function.
To demonstrate this behaviour, just create a file called index.php :
<?php
spl_autoload_register();
var_dump(new Main\Application);
Then create a folder named Main located right next to the index.php file. Finally, creates a file called Application.php located into Main and p...
How do you make Git ignore files without using .gitignore?
...See also this SO question)
The other two solutions involve updating the index (git update-index):
git update-index --assume-unchanged: see "Git: untrack a file in local repo only and keep it in the remote repo".
It is mentioned by Elijah Lynn in the comments.
You can even ignore a folder co...
ANTLR: Is there a simple example?
... found this the most tricky part to get right. See http://wiki.bitplan.com/index.php/ANTLR_maven_plugin
https://github.com/BITPlan/com.bitplan.antlr/tree/master/src/main/antlr4/com/bitplan/expr
contains three more examples that have been created for a performance issue of ANTLR4 in an earlier vers...
PostgreSQL: Show tables in PostgreSQL
...
CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i' THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' END as "Type",
pg_catalog.pg_get_userbyid(c.relowner) as "Owner"
FROM pg_catalog.pg_class c
LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
WHERE c.rel...
How can I remove duplicate rows?
... SQL Server LEFT JOIN is less efficient than NOT EXISTS sqlinthewild.co.za/index.php/2010/03/23/… The same site also compares NOT IN vs NOT EXISTS. sqlinthewild.co.za/index.php/2010/02/18/not-exists-vs-not-in Out of the 3 I think NOT EXISTS performs best. All three will generate a plan with a self...
Fastest way to extract frames using ffmpeg?
...is is about 20 times faster. We use fast seeking to go to the desired time index and extract a frame, then call ffmpeg several times for every time index. Note that -accurate_seek is the default
, and make sure you add -ss before the input video -i option.
Note that it's better to use -filter:v -fp...
Why do some websites add “Slugs” to the end of URLs? [closed]
...
I recently changed my website url format from:
www.mywebsite.com/index.asp?view=display&postid=100
To
www.mywebsite.com/this-is-the-title-of-the-post
and noticed that click through rates to article increased about 300% after the change. It certainly helps the user decide if wha...