I just realized that my suggestions have a serious functional bent.
I don't address the need to create an array on the stack then fill it
in later, obviously necessary for performance in certain cases as well
as C interop.
In this case, I prefer the a mutation on the initial suggestion:
let x = [int]'10
or
x = [int]#10
I think I prefer ` because it's less syntactically busy in monospace
font. Failing that, I still prefer # over /
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