Newspeak (an exploratory Smalltalk-style language) demo exploring combining method editing with debugging: https://www.youtube.com/watch?v=74WqdS_58uY
miniblog.
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I've seen two different references to Newspeak today (modules, methods). Sadly I don't think my ST-fu is strong enough yet to grok it.
Video demo of Newspeak: https://youtu.be/Yv7yX27Tx4U (if you have example values for self & all arguments, you can run code that you're reading!)
A short history of live programming: https://youtu.be/L4FLWSt9Px4 great demos of Smalltalk and Newspeak by Gilad Bracha, the creator of Newspeak.