Pandas + IPython notebook is really growing on me. It's a nice way to interact with code. I'd like to see more HTML __repr__'s (eg lists).
miniblog.
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Most of the gradual type systems I've seen are targetting existing languages: you want to interact with existing libraries that don't have type annotations.
Are there many greenfield languages with gradual types? It's a useful technique in other cases, such as refactoring.
A live demo of how you edit BASIC code (its REPL equivalent) inside a thoughtful article on how we interact with programming languages:
