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Pardon my denseness here ... but what does 'lexical' mean in this context?
> Another dense David here : I didn't understand either.
Lexical scoping is when local variables are scoped to the code; dynamic
scoping is when they're scoped to the invocation of the code.
Looking up scoping on Wikipedia, I was reminded of a consequence of
purely lexical vs. purely dynamic scoping that I'd forgotten in the 2
decades since I got my sheepskin: with purely lexical scoping, variables
not defined within the most local block will resolve according to the
nesting of blocks in the code, whereas in purely dynamic scoping, they
will resolve according to the invocation stack.
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