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Anonymous recursive PHP functions
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In order for it to work, you need to pass $factorial as a reference
$factorial = function( $n ) use ( &$factorial ) {
if( $n == 1 ) return 1;
return $factorial( $n - 1 ) * $n;
};
print $factorial( 5 );
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Debug Error \"pure virtual function call\" 原因解析 - 更多技术 - 清泛...
...函数中抛出异常,不然,我们不得不面对以下两个严重的问题:
二次异常导致程序退出;
遗留下来的未完全销毁的对象与未完成的工作导致的后续问题
pure virtual function call就是这种情况。
但是理想与现实总是有差距的,...
$PHP_AUTOCONF errors on mac os x 10.7.3 when trying to install pecl extensions
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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How can I store my users' passwords safely?
...ion: password_hash() and password_verify(). It provides several options in order to achieve the level of password security you need (for example by specifying a "cost" parameter through the $options array)
<?php
var_dump(password_hash("my-secret-password", PASSWORD_DEFAULT));
$options = array(
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MongoDB副本集详解 优于以往的主从模式 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...来很旧了,停止选举等待人来操作。
? 如果上面都没有问题就选择最后操作时间戳最新(保证数据是最新的)的服务器节点作为主节点。
选举的触发条件
初始化一个副本集时。
副本集和主节点断开连接,可能是网络问题。...
How to set a cookie for another domain
...ow can you say this however youtube is reading cookies created by gmail in order to show their account on youtube?
– TAHA SULTAN TEMURI
Jul 8 '18 at 8:46
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领域驱动设计系列(二):领域Model? - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Domain Model, 同时我们又设计了ViewModel, 这样一般也没什么问题,职责也很清晰。但是有几个问题
我们要做很多的模型转换,转入转出。当然我们可以用AutoMapper来但是AutoMapper的性能实在难以恭维,大家可以在网上搜索AutoMapper per...
How do I obtain crash-data from my Android application?
...$indexCount = count($dirArray);
sort($dirArray);
print("<TABLE border=1 cellpadding=5 cellspacing=0 \n");
print("<TR><TH>Filename</TH><TH>Filetype</th><th>Filesize</TH></TR>\n");
for($index=0; $index < $indexCount; $index++) {
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How to get the request parameters in Symfony 2?
... Answer is correct $request->get('foo'); works for ALL bags (order is : PATH, GET, POST). Nevertheless, $request->request->get('foo'); works only for POST bag. Finally, the first one ($request->get()) is not recommended if we know where the data is (GET/POST).
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新浪是如何分析处理32亿条实时日志的? - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Checklist。
随着用户数据的不断增长,index管理也成了大问题,我们需要基于大量不同的用户配置定期的create、optimize、close、delete、snapshot不同的index,在某个服务器上手工配置crontab已是不可能,而且cron是单点。于是我们开发...