Promoting a broadcasted array

[rafael.guerra]

@cstjean

Alternatively, is there an efficient Base function that promotes all values in an Array to a concrete type? promote_to_same_type(Any[1,2,9.4]) that yields [1.0,2.0,9.4]?

Linking related old post.

FWIW, the following promote_array() function, inspired by the code above, seems to run a bit faster:

promote_array(v) = convert(Array{eltype(promote(map(zero, unique(typeof(v) for v in v))...))}, v)

v = rand((1, 4.5), 100_000)
promote_array(v)
@btime promote_array($v)  # 3.6 ms (99526 allocs: 2.28 MiB)