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How to use the SUMPRODUCT function in Excel, one of Excel’s math and trig functions, using multiplication, addition, subtraction, and/or division to return the sum of the products of corresponding ranges or arrays.

Ruby2JS is an extensible Ruby to modern JavaScript transpiler you can use in production today.

Style guides for Google-originated open-source projects

A comprehensive, curated list of open-source Ruby on Rails applications.

Python implementation of the Eliza chatbot. Contribute to wadetb/eliza development by creating an account on GitHub.

If you ask me to name the most misunderstood aspect of Python, I will answer without a second thought: the Python import system. Just remember how...

math and logic formula parser and evaluator. Contribute to rubysolo/dentaku development by creating an account on GitHub.

Here we'll compare three command-line parsing libraries - argparse, docopt, and click.

Definitions of algorithms, data structures, and classical Computer Science problems. Some entries have links to implementations and more information.

Really good resources for html, css, design, etc. etc.

Railsify is a central resource and directory for all Ruby on Rails plugins maintained by the community

Short Ruby on Rails screencasts containing tips, tricks and tutorials. Great for both novice and experienced programmers.

This is a famous course written by a really cool quirky Ruby celebrity (known as _why -- the underscore is part of the name). You might find it useful!

Bitbucket is a alternative to GitHub. It's very similar. But the one big different is that even Public repositories are available free.

Very nice list of idioms

Ruby for iOS

Useful info about how to authenticate from Rails to Google