From: Xavier Noria <fxn@...>
Date: 2007-12-07T07:51:55+09:00
Subject: Re: array iterator that have more arrays that also need iter

On Dec 6, 2007, at 11:33 PM, Raimon Fs wrote:

> I'm using your first suggestion:
>
>>   values = invoice_calculs.map do |ic|
>>     ic.attributes
>>   end.map do |a|
>>     a.values
>>   end.flatten
>
> with or without the .flatten all the values are written at the same  
> time
> ...
>
> your new suggestion : invoice_calculs.map(&:attributes).map(&:values)
>
> also writtes the three values at one time, I need each value  
> separated:
>
> element one:
> 82567.3695778.2113210.85
>
> and I need:
> 82567.36
> 95778.21
> 13210.85
>
> I hope it's more clear what I'm trying to do now ...

The version with flatten gives you all the values in a row in a single  
array. From the YAML dump that would be

   ["82567.36", 95778.21", "13210.85", "17.91", "255.81", "273.72", ...]

The version without flatten gives an array of arrays. Each array  
element contains the values corresponding to a single InvoicesCalcul:

   [["82567.36", 95778.21", "13210.85"], ["17.91", "255.81",  
"273.72"], ...]

Please use that array notation to indicate how would the desired  
result look like if it is none of those.

-- fxn