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TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 算法
但是上面的这个算法在重传的时候会出有一个终极问题——你是用第一次发数据的时间和ack回来的时间做RTT样本值，还是用重传的时间和ACK回来的时间做RTT样本值？
这个问题无论你选那头都是按下葫芦起了瓢。 如下图所...
Can PHP PDO Statements accept the table or column name as parameter?
...lowed_columns_array['tblTheTable'] = array('the_col_to_check');
Then the PHP check before running PDO looks like...
if(in_array($inTableName, $allowed_tables_array) && in_array($inColumnName,$allowed_columns_array[$inTableName]))
{
$sql = "SELECT $inColumnName AS columnInfo
...
What are five things you hate about your favorite language? [closed]
...
PHP:
1) Forces me to make unnecessary variables:
$parts = explode('|', $string);
$first = $parts[0];
2) An implementation of lambdas so lame it is roughly equivalent to using eval() and so hideously wrong I have never use...
How to display HTML tags as plain text [duplicate]
...
If the question's text were to be generated by PHP, htmlspecialchars() does what this answer suggests: replace the less-than and greater-than signs (and others) with their HTML entities. But the question does not specify, so this more general answer is a superset of all t...
PHP ORMs: Doctrine vs. Propel
...better like the way you work with queries (DQL instead of Criteria):
<?php
// Propel
$c = new Criteria();
$c->add(ExamplePeer::ID, 20);
$items = ExamplePeer::doSelectJoinFoobar($c);
// Doctrine
$items = Doctrine_Query::create()
->from('Example e')
->leftJoin('e.Foobar')
...
LinkedIn联合创始人：初创企业早期别花钱买用户 - 资讯 - 清泛网 - 专注C/C...
...程是如何运作的”的数据以及信息，虽然他们设计的招聘问题很有趣，但事实上经过专业训练的HR都不会提出(Google报告里)这些问题，这些问题的设计者，要是很熟悉HR问的问题但又不拘泥于传统观念的人，他也必须是要理解招聘...
How does Facebook Sharer select Images and other metadata when sharing my URL?
...t of facebookexternalhit/1.1 (+https://www.facebook.com/externalhit_uatext.php), will access your page and cache the meta information. To force Facebook servers to clear the cache, use the Facebook Url Debugger / Linter Tool that they launched in June 2010 to refresh the cache and troubleshoot any ...
check if jquery has been loaded, then load it if false
...Query
OR
include_once equivalent for js. Ref: https://raw.github.com/kvz/phpjs/master/functions/language/include_once.js
function include_once (filename) {
// http://kevin.vanzonneveld.net
// + original by: Legaev Andrey
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.n...
How to prevent a jQuery Ajax request from caching in Internet Explorer?
...ks var ajaxfile = base+"index.php/msc/popup_view/"+obj+"/"+id+"/"+no_tab; $.ajax({type: "GET",url: ajaxfile, //contentType: "application/json; charset=utf-8", cache: false, success: function(msg){ $("#popup").html(msg); } });
...
nginx server_name wildcard or catch-all
...ork great. Now I'd like all other domain requests to go to a single index.php - I have loads of domains and subdomains and it's impractical to list them all in an nginx config.
...