On 0.5, there is a sneaky trick that I learnt today: wrap the first argument in square brackets:
julia> x = ["3.1", "-17.2"]
2-element Array{String,1}:
"3.1"
"-17.2"
julia> parse.([Float64], x)
2-element Array{Float64,1}:
3.1
-17.2
On 0.6, it’s just
julia> parse.(Float64, x)