add length parameter to type

Author: axsk

src/univariate.jl

@@ -70,14 +70,16 @@ function kde_range(boundary::(@compat Tuple{Real,Real}), npoints::Int)
     lo:step:hi
 end
 
-immutable UniformWeights
-    w
+immutable UniformWeights{N} end
 
-    UniformWeights(n) = new(1/n)
-end
+UniformWeights(n) = UniformWeights{n}()
 
 Base.sum(x::UniformWeights) = 1.
-Base.getindex(x::UniformWeights, i) = x.w
+Base.getindex{N}(x::UniformWeights{N}, i) = 1/N
+Base.length{N}(x::UniformWeights{N}) = N
+values{N}(x::UniformWeights{N}) = fill(x[1], N)
+eltype(x::UniformWeights) = eltype(x[1])
+isempty{N}(x::UniformWeights{N}) = N==0
 
 typealias Weights Union{UniformWeights, RealVector, WeightVec}