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kozross/why-this-break.jl

Created June 11, 2018 23:23
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why-this-break.jl
arr = [5, 8, 11, 0]
function bitat(x,i)
x & (1 << (i - 1)) != 0
end
y = BitMatrix(bitat(arr[i], j) for i in 1:4, j in 1:4)
#=
This fails, claiming:
MethodError: Cannot `convert` an object of type Base.Generator{Base.Iterators.Prod2{UnitRange{Int64},UnitRange{Int64}},##9#10} to an object of type BitArray{2}
This may have arisen from a call to the constructor BitArray{2}(...),
since type constructors fall back to convert methods.
How do I spell this request properly, so that my result is a BitMatrix?
=#
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