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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
edit: function replacements are now supported!
I'm afraid you can't use functions for replacement at the moment - and also there aren't backreferences so your encoder wouldn't work. The code would work but would insert the stringified function - hence lack of memory :)
I'll see about adding the functions - that shouldn't be too hard.
Backreferences are possible, but a reasonable amount of work - I wonder how often they're used. While your RLE code is neat, it's pretty easy and possibly faster to implement in normal JS :)