Efficient Repeat: Array of single value

New to Julia
2

You can use FillArrays.jl for this:

julia> using FillArrays

julia> x = Fill(false, 10)
10-element Fill{Bool}: entries equal to false

julia> x[3]
false

julia> x[11]
ERROR: BoundsError: attempt to access 10-element Fill{Bool} at index [11]
Stacktrace:
 [1] throw_boundserror(A::Fill{Bool, 1, Tuple{Base.OneTo{Int64}}}, I::Tuple{Int64})
   @ Base ./abstractarray.jl:645
 [2] checkbounds
   @ ./abstractarray.jl:610 [inlined]
 [3] getindex(F::Fill{Bool, 1, Tuple{Base.OneTo{Int64}}}, kj::Int64)
   @ FillArrays ~/.julia/packages/FillArrays/FPGoE/src/FillArrays.jl:41
 [4] top-level scope
   @ REPL[11]:1
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