> Is it possible to extend JavaScript syntax to support Swift style block
> syntax[1]?
>
> In Swift it's possible to omit return keyword
> ```
> reversed = names.sort( { s1, s2 in s1 > s2 } )
> ```
As you note below this is already possible in es6, and might I add, has much
more intuitive syntax in Es6. The swift syntax looks like a list comprehension
gone wrong.
> or omit argument declaration like this:
>
> ```
> reversed = names.sort( { $0 > $1 } )
> ```
I for one think this is a bad idea - use rest arguments instead. It's pretty
terrible as far as readability goes, although I'd like to see more examples of
it being used in Swift code.
> or apply an operator to arguments of a function
>
> ```
> reversed = names.sort(>)
> ```
This might actually be possible - I can't think of any ambiguous situations for
passing operators as if they were first class functions. If it is possible, I'd
like to see this done.
> We have the first feature in ES2015 already:
>
> ```
> let sorted = names.sort((a, b)=> a > b);
> ```
>
> But for omitting argument declaration we need to find an alternative to $0,
> $1... since those are valid variable names in JS. Maybe we can use #0, #1...
> instead.
>
> This is very useful for functional programming aspect of JS. For example in a
> filter function:
>
> ```
> let passed = objs.filter(#0.passed)
> ```
>
> [1][https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/Closures.html]
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