Another innovative feature of Pharo: you can see diffs at the level of object methods, not dumb text! #pharomooc
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Just realised that #pharomooc is using #moocpharo as the official hash tag. Argh. I thought it was quiet.
"self is dynamic, but super is static" #pharomooc discussing method lookup. Profound insight, but breaks if you allow multiple inheritance!
Not enough systems (even distros!) ship with source code included. I'm impressed that the code examples in #pharomooc are real Pharo code!