ES4 draft: array initializer expressions

[Olav Kjær]

I have a (perhaps stupid) question regarding the Array type syntax. What is
the use case for a type like:

[string, double, ...boolean]

I understand the utility of heterogeneous tuples of a fixed size, and of
homogeneous lists of variable size, but I don't really see when I would use
a hybrid like this. What am I missing?

regards
Olav Junker Kjær
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