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How to reset root password in MySQL 8
The user password in MySQL is stored in the user table, the password reset is actually to change the value of record in this table. To change the password in case the password is forgotten, the idea is to bypass the authentication of MySQL and get into the system and update the record password value with SQL command. In MySQL 5, one can start MySQL service with --skip-grant-tables option, this option will tell the service to skip loading the grant tables when starting, hence the root user can lo...
SQL Grammar Summary
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SQL,Query,Summary,Select,Update,Delete,I 2011-05-20 12:04:55
Creating a PHP 5 Extension with Visual C++ 2005
This article describes the steps to create a custom PHP extension DLL for the Windows platform. The Zend API documentation that comes with PHP 5 on Windows (see php_manual_en.chm) does a good job explaining how to write extension methods, parse method parameters, and return values. But there is not currently a good step-by-step tutorial on how to get your first extension project up and running on Windows. The aim of this article is to fill that gap. Prerequisites Visual Studio 2005 You can...
PHP,Extension,Writing,Windows,Step by st 2011-07-23 01:56:53
$40 million per year to keep Wikipedia running
Wikipedia is an incredibly frugal and efficient nonprofit organization. It serves half a billion visits per month. But do you know how much it costs to keep this huge website running? According to 2012-13 Wikimedia Foundation Annual Plan, the expected spending is around $40 million. Some may argue that Wikipedia is just a site with "just text", why does it cost so much? Oliver Emberton shared his view. To keep Wikipedia running and serve 500 million visits per month. First, you're going to need ...
Tricks with Direct Memory Access in Java
Java was initially designed as a safe managed environment. Nevertheless, Java HotSpot VM contains a “backdoor†that provides a number of low-level operations to manipulate memory and threads directly. This backdoor – sun.misc.Unsafe – is widely used by JDK itself in packages like java.nio or java.util.concurrent. It is hard to imagine a Java developer that uses this backdoor in any regular development because this API is extremely dangerous...
Java,Directly memory access,Tricks,JVM 2012-02-13 05:31:19
Format JSON data on Ubuntu
JSON now becomes a very popular data format because of its simplicity and light-weight. Nowadays many RESTful APIs will offer a choice of exchanging JSON data between the server and client. Sometimes the data may not be formatted and it cannot be easily read by human beings. It's frequently desired that the unformatted JSON data should be formatted before read. Today we will show a few ways to format JSON data on Ubuntu. Assume we have a json file test.json with below content. { "title": "Test"...
RUBY,PYTHON,NODEJS,JSON,JQ,PERL,LINUX,UBUNTU,YAJL 2016-08-17 11:05:09
PHP advisory file lock : flock
When we process a file in PHP, we may often need to acquire a lock so that other scripts cannot edit the same file at the same time. There is a flock() function in PHP which can help us lock the file we want to process. But there is one issue we should take care. Recently, ffb encountered one issue while he was trying to lock a file handle. The codes are below: $filename = "/tmp/lock.txt"; $fp = fopen($filename, "r+"); if (!$fp...
flock(),advisory locking,PHP 2013-04-23 11:42:48
Why PHP is (so much) better than Ruby?
I attended this weekend my first Ruby conference, Ruby Lugdunum in Lyon. Besides cool talks and the fun of meeting people like Nick, Blake, or Laetitia, my friend Camille & I did a surprise lightning talk about how PHP is better than Ruby. Here are the slides and a more detailed transcript: A lot of free hosts: it’s easy to find a PHP host, you just have to google “free php host†and you find a ton of free PHP/MySQL hostsBigger community: The PHP community is really huge,...
PHP,Ruby,Comparism,Difference,Advantage 2011-06-29 08:34:12
Inspiring facts about JavaScript
JavaScript has been advocated as the first language to be learned by people who want to program. We have discussed the reasons why we should do so. Recently with the popularity of Node.js, JavaScript has become a full-stack language, it can be used as both frontend and backend programming language. Today we will give some hard facts which will convince you about the popularity of JavaScript. Just like William Ting said ""JavaScript will stay relevant as long as people use the internet". Ye...
JavaScript,popularity 2014-06-07 08:52:36
The world's first HTML5 SIP client
This is the world's first open source HTML5 SIP client (May 12, 2012) entirely written in javascript for integration in social networks (FaceBook, Twitter, Google+), online games, e-commerce sites... No extension, plugin or gateway is needed. The media stack rely on WebRTC. The client can be used to connect to any SIP or IMS network from your preferred browser to make and receive audio/video calls and instant messages. The protocol parsers (SIP, SDP...) are highly optimized using Ragel loo...
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