Codefetch is a search engine for source code from published books. It instantly connects programmers and authors by finding code excerpts taken from published books.
Software engineers and IT workers get the answers they need, and authors get exposure for their books. Codefetch’s query system combines regular expressions and traditional web keywords to search dozens of computer languages.
Codefetch search results are syntax-colored excerpts from published computer books, and these very books are offered for sale.

Codefetch lets you combine three types of searches:
Google-style
Enter words separated by spaces and they’ll be found wherever they all appear on a page.
Full-text
Like a text editor, Codefetch can find $, {, % or any other ASCII symbol.
Regular Expression
You can even use a few regular expression constructs. Currently supported regular expression constructs:
.* Match any character or space or anything or nothing at all.
.+ Match any character or space or anything (but not nothing–there has to be at least one char).
\d+ Match one or more digits.
\s Match one space or tab or other whitespace.
\s+ Match one or more spaces or tabs or other whitespaces.
\b Match a word boundary.
Browse to CodeFetch, select the programming language(s) you need to search source code for, then type your query in the input box, press the Fetch button, and Codefetch will give you the desired output.

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Awesome! Thanks for sharing it!
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