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by Kiro 4064 days ago
What is proper lexical scoping? Does JavaScript get it right?
1 comments
coldtea 4064 days ago
No. Javascript gets it horribly wrong without "var", still terribly wrong with "var", and somewhat better with "let".
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Kiro 4064 days ago
I don't understand what let has to do with functional programming though (enclosing a variable within if () {} instead of function block etc). Do you mind elaborating?
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coldtea 4064 days ago
The question wasn't about functional programming per se, but about lexical scope.

"let" keyword in ES6 allows Javascript to have "lexical" style scoping (with some caveats due to JS legacy).

That said, several ways of scoping a variable can be had in functional programming. Have a look here for some more explanation with regards to Common Lisp:

http://stackoverflow.com/questions/463463/dynamic-and-lexica...

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ufo 4064 days ago
The "this" keyword is also a mess. I wonder when well be able to start using the new arrow-syntax lambdas everywhere.
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