Search by code

Yandex

Yandex made it possible to search through the directories and forums of programmers.
Just by typing we write a programming language, a space and a query. For example, C++ adjacent_find.
Languages supported: Perl, PHP, PostgreSQL, Python, C/C++/STL, Win32, Java, HTML/CSS/JavaScript, MySQL).

searchcode

Probably the main site that I would recommend for finding the code.
We simply enter the code snippet into the search and look at the output.

The database at the moment:
More than 20 million lines of code from 7.000.000 Projects.