From: Xavier Noria <fxn@...>
Date: 2007-12-07T04:44:32+09:00
Subject: Re: array iterator that have more arrays that also need iteratio

On Dec 6, 2007, at 8:25 PM, Raimon Fs wrote:

> I have one array, and each element of this array, has another array.

<snip>
>
> here is may array dumped:
>
> - - !ruby/object:InvoicesCalcul
>    attributes:
>      1600_base: "82567.36"
>      1600_value: "95778.21"
>      1600_tax: "13210.85"
> - - !ruby/object:InvoicesCalcul
>    attributes:
>      700_tax: "17.91"
>      700_base: "255.81"
>      700_value: "273.72"
> - - !ruby/object:InvoicesCalcul
>    attributes:
>      0_base: "707.59"
>      0_tax: "0.0"
>      0_value: "707.59"
>
> I need:
>
> 82567.36 95778.21 13210.85
> 17.91 255.81 273.72
> 707.59 0.0 707.59

Looks like you have a collection of InvoicesCalcul, each of them with  
an accessor "attributes", which is a hash:

   values = invoice_calculs.map do |ic|
     ic.attributes
   end.map do |a|
     a.values
   end.flatten

Those could be AR objetcs, in Rails you can write that this way:

   values = invoice_calculs.map(&:attributes).map(&:values).flatten

-- fxn