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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
d[18]is liked.substr(18,1)- so it still returns a string. But in JavaScript numeric strings are treated as numbers when involved in maths, so it's just a1or a0.Not great, but it's buried deep in a module, and users will be more worried about it being small and fast :)