Re: Struggling with writing an iterator

[jlhouchin]

I have read that before. I don't quite understand all of it in relation to how 
to write an iterator and call it.

However, I went and put back the {.closure.} in my iterator and it works if I 
call like this:
    
    
    var stream = pricestream
    for p in stream("oanda", EUR_USD):
      ...
    
    
    Run

What I don't understand is something like this: 
    
    
    iterator walkDir*(dir: string; relative=false): tuple[kind: PathComponent, 
path: string] {.
      tags: [ReadDirEffect].} =
      ...
      when nimvm:
        for k, v in items(staticWalkDir(dir, relative)):
          yield (k, v)
      ...
    
    #And  walkDir  is called just like just like a proc   and it contains no 
{.closure.}
    
    
    for file in walkDir(datapath / source / $instrument / "Prices"):
        paths.add(file.path)
        ...
    
    
    Run

Thanks for at least getting me working even if lack understanding.

I don't understand why the intermediate step of assigning the iterator to a 
variable and then providing the variable with the parameters.

Thanks again.