6 recommended code search engines

Code Search is very popular recently, and it does help a lot for developers. Here we will make a summary. If there are other good ones, we recommend you ~
Recommendation criteria: fast, full-language support, and Ajax support
1,Gotapi[Http://start.gotapi.com/]
Supports HTML, CSS, css2, JavaScript, actionscript, Google Code, XML, XSL, XPath, XSD, PHP, Ruby, Python, Perl, As, ColdFusion, C, programming languages such as C ++, MySQL, PostgreSQL, Oracle, and Java. Using the Ajax input box technology, real-time drop-down list prompts and quick locating ~ It is really convenient. It supports Digg and the speed is good.

2,Quickref[Http://www.quickref.org/]
Supports less languages than C, C ++, CSS, HTML, HTML Dom, Java, JavaScript, MySQL, Perl, PHP, Python, and Ruby, however, you can add widgets to Google.

3,Krugle[Http://www.krugle.com/]
The Supported languages are comprehensive, including ActionScript, flex, SQL, and XML, and Ajax technology is also used to display search results, which is good.

4,Oreilly codeHttp://labs.oreilly.com/code/
If you read oreilly books frequently, this search will be very useful to you. You can search for sample code in nearly 700 books published by oreilly, the sample code in books is actually more standard and efficient, and it is one of the good ways to learn programming.

5,Google codesearchHttp://www.google.com/codesearch
I'm afraid it's a well-known code search engine. I'm not talking about it anymore. There are many articles on the Internet, including Google's influence and reach ~

6,Koders[Http://www.koders.com/]
A code search engine that I have previously recommended is easy to use and supports many languages. It also supports searching and filtering projects and authorization protocols.

The languages currently supported by other code search engines mainly involve Java and C, including "code China" in China, which is not recommended.