Bang Bang!! My Interpreter Shot Me Down!
summary
Covers exactly what !! returns and why, lists the actual falsy values, and traces parsing and interpretation in V8 so the double-bang’s evaluation path is visible; uses source-code reading of V8 (not just promises of “examples”) and wraps the investigation in a musical ballad, so expect lyric interludes plus concrete notes about parser/interpreter stages and optimizations rather than slides-only handwaving.
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