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What is the difference between Google App Engine and Google Compute Engine?
...install all the software that you want, which is usually a web server, database, etc...
In app engine you don't manage the operating system of any of the underlying software. You only upload code (Java, PHP, Python, or Go) and voila - it just runs...
App engine saves tons of headache, especially ...
关于php的socket初探 - PHP - 清泛IT论坛，有思想、有深度
...rno)");
stream_set_blocking($socket_server, 0); // 非阻塞
$base = event_base_new();
$event = event_new();
event_set($event, $socket_server, EV_READ | EV_PERSIST, array(__CLASS__, 'ev_accept'), $base);
event_base_set($event, $base);
event_add($event);
event_base_loop($base);...
What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
...
An SQL JOIN clause is used to combine rows from two or more tables,
based on a common field between them.
There are different types of joins available in SQL:
INNER JOIN: returns rows when there is a match in both tables.
LEFT JOIN: returns all rows from the left table, even if there are ...
Simplest way to profile a PHP script
...e, which I haven't tried yet. Seriously, isn't there a modern, updated CLI-based profiling tool for PHP that installs with Homebrew, requires minimal setup and gives easily human-readable output?
– forthrin
Aug 29 '16 at 6:38
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When is a CDATA section necessary within a script tag?
...HTML parser) to parse the markup because the document was sent with an XML-based mime type or the file containing the markup has an XML-based file extension".
– Shadow2531
Feb 1 '17 at 12:07
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How to normalize a path in PowerShell?
...ell context, can have unintended side-effects, such as resolving to a path based off the initial working directory (not your current location).
What you do is you first qualify your path:
Join-Path (Join-Path (pwd) fred\frog) '..\frag'
This yields (given my current location):
C:\WINDOWS\system3...
What are the default access modifiers in C#?
...taining type.
Derived classes cannot have greater accessibility than their base types. In other words, you cannot have a public class B that derives from an internal class A. If this were allowed, it would have the effect of making A public, because all protected or internal members of A are accessi...
HTTP GET request in JavaScript?
...riginal poster later said: "Thanks for all the answers! I went with jQuery based on some things I read on their site.".
– Pistos
Jun 26 '14 at 19:49
add a comment
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Using margin:auto to vertically-align a div
...their used values would compute as zero
margin-top:-50% because percentage-based margin values are calculated relative to the width of containing block
In fact, the nature of document flow and element height calculation algorithms make it impossible to use margins for centering an element verticall...
What special characters must be escaped in regular expressions?
...er inside character classes. The regex flavor in Delphi's RTL is actually based on PCRE. Python, Ruby, and XML have their own flavors that are closer to PCRE than to the POSIX flavors.
– Jan Goyvaerts
Feb 23 '17 at 8:05
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