collect fails to work for all finite iterators

[simonbyrne]

julia> collect(enumerate(Filter(x -> x>0, randn(10))))
ERROR: MethodError: `length` has no method matching length(::Filter{Function,Array{Float64,1}})
 in collect at array.jl:269
 in collect at array.jl:283

Rather than call applicable, maybe it would be better to use try/catch?

[stevengj]

Probably ... the performance overhead of the try/catch seems unlikely to be an issue here, since I doubt collect will be a inner-loop function.

[KristofferC]

This seems to work now:

julia> collect(enumerate(Iterators.Filter(x -> x>0, randn(10))))
4-element Array{Tuple{Int64,Float64},1}:
 (1,0.0895511)
 (2,1.58289)  
 (3,0.35398)  
 (4,0.496553) 

[tkelman]

and is it tested? don't close things that aren't