github
I used Github search which is good though sometimes I like to use Google's parameters for better search handling of what I want.
site:github.com foreach
Unfortunately for the first few pages, I am just finding repositories and not the actual code.
It's for you to keep track of gists that have made you smile or caught you off guard and you want to have a list of them stored at Github.
It is just like a bookmark system. You mark a star on a gist you find interesting or like and then you can find them at a glance under your account at starred gists.
The link to your starred gists will be there for your account, but if you have nothing, it will simply prompt you to create a new gist. One that you may star yourself.
The raw files for GitHub repositories are stored at:
https://raw.github.com/user/repository/branch/filenameFor example:
https://raw.github.com/slhck/dotfiles/master/.zshrc
You can access this file by clicking the Raw button for a file:
Best Answer
If the search engine crawlers honour the robots.txt then no, you won't be able to use external search engines to search for code hosted on GitHub.
Here's the line from their robots.txt file disallowing that:
If you go jumping about repos you'll see the path to the source code is something like this:
This matches the rule and thus, you won't get anything back when using compliant search engines.