Parameterising MinHashSketch

example.jl

# From this:
type MinHashSketch
    sketch::Vector{UInt64}
    kmersize::Int

    function MinHashSketch(sketch::Vector, kmersize::Int)
        length(sketch) > 0 || error("Sketch cannot be empty")
        kmersize > 0 || error("Kmersize must be greater than 0")
        new(sketch, kmersize)
    end
end

# To this:
type MinHashSketch{k}
    sketch::Vector{UInt64}

    function MinHashSketch{k}(sketch::Vector)
        length(sketch) > 0 || error("Sketch cannot be empty")
        k > 0 || error("Kmersize must be greater than 0") # This could even be reworked into a generated function, or I believe more complex "where" syntax is comming to parametric functions.
        new(sketch, kmersize)
    end
end

# With k as a type parameter, you can do MinHashSketch{10}(myvector), and some descisions about K size can be relegated to compile time with generated functions, or otherwise removes the need to pass k as a value.