Classic #Emacs tip: if you use query-replace 'foo' with 'bar', Emacs will replace 'Foo' with 'Bar' and 'FOO' with 'BAR'. Ingenious.
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Individuals and interactions over processes and tools => Competence trumps process
Working software over comprehensive documentation => Minimize time from program launch to deployment of simplest useful functionality
I really like the DoD's phrasings of classic agile maxims:
I've been playing with 'sliders' in difftastic, the classic diff problem where you highlight an adjacent value that is correct but weird.
I've taught difftastic to penalise sequences across newlines. This largely works, but it hurts perf (another degree of freedom to solve).
A classic syntactic debate: do you prefer types before or after parameters? Why?

