Are you are programmer, who code for multiple languages, Here a Search Engine target for you folks. SearchCode.de is an search engine for all programming related documentation and it’s supported information.
If you search for a function name in SearchCode Engine, it will pull the function name matching all the languages with its description and syntax. You can also limit your search by prefix/postfix to the language name (Example : putc C) for the exact match result.In addition to languages documentation it’s has an index for Windows and Linux Commands.
I feel Google Code Search is best friend to search for code snippet and to debug your existing problem’s and you can also search through Regular Expression that is not supported in Google Search Engine.