Re: [julia-users] collecting multiple vectors from infinite iterator

[Mauro]

Somewhat off topic, as you seem to be dealing with ragged arrays.  Are
you aware of https://github.com/mbauman/RaggedArrays.jl ?  Also there
are references to other, older implementations:
https://github.com/mbauman/RaggedArrays.jl/issues/2

On Wed, 2016-10-12 at 16:16, Tamas Papp  wrote:
> For example, I want
>
> collect_ragged(countfrom(1), [2,3,4])
>
> to return
>
> 3-element Array{Any,1}:
>  [1,2]
>  [3,4,5]
>  [6,7,8,9]
>
> I implemented it as
>
> function collect_ragged(iterator, lengths)
> result = Vector(length(lengths))
> s = start(iterator)
> for (i,l) in enumerate(lengths)
> v = Vector{eltype(s)}(l)
> for j in 1:l
> (v[j],s) = next(iterator, s)
> end
> result[i] = v
> end
> result
> end
>
> bit I am wondering if there is a more elegant solution.

[julia-users] collecting multiple vectors from infinite iterator

[Tamas Papp]

For example, I want

collect_ragged(countfrom(1), [2,3,4])

to return

3-element Array{Any,1}:
 [1,2]
 [3,4,5]  
 [6,7,8,9]

I implemented it as

function collect_ragged(iterator, lengths)
result = Vector(length(lengths))
s = start(iterator)
for (i,l) in enumerate(lengths)
v = Vector{eltype(s)}(l)
for j in 1:l
(v[j],s) = next(iterator, s)
end
result[i] = v
end
result
end

bit I am wondering if there is a more elegant solution.