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Re:TypeScript Seals My Penchant for JavaScript by sjtgraham on Friday September 30, 2016 @11:46AM (#12613150)
This is the lambda syntax in Ruby:

Defining a lamba `foo = ->(x) { x * x }`

Calling it `foo[10]` or `foo.call(10)`

I don't see anything hacky about that at all.

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