From: Bruno Moura <brunormoura@...>
Date: 2009-11-29T07:45:18+09:00
Subject: Re: iterate over a hash with values containing a array of hashes

Thanks guys, you rocks!

The snippets that you showed save my time!

I can iterate over a simple hash or array, but when is necessary work if 
a more complex structure, like a array of hashes or a hash of array of 
hashes I
feel paralyzed.I don't know how I should use blocks in the right way or 
efficiently.

For me is really difficult to understand this.

How can I improve my practice with this kind of task?

Thanks again!


daz wrote:
> Bruno Moura wrote:
>> Hi
>> 
>> I need iterate over a hash with values containing a array of hashes for
>> build a string with comma values
>> 
>> (...)
>> 
>> Everyone can help me with this?
>> 
>> thanks so much
> 
> 
> ###========================
> 
> input = {"F15"=> [
>                 {"first"=>"01", "last"=>"" , "data"=>"ATX",
>                     "Xcode"=>"F15", "type"=>"G_TRD"},
>                 {"first"=>"Aero", "last"=>"Z", "data"=>"VTA",
>                     "Xcode"=>"F15", "type"=>"H_TGFE"},
>                 {"first"=>"digg", "last"=>"" , "data"=>"GFC",
>                     "Xcode"=>"F15", "type"=>"T_1000"}],
>           "F17"=> [
>                 {"first"=>"X01", "last"=>"Sx", "data"=>"ATT",
>                     "Xcode"=>"F17", "type"=>"H_TGFE"},
>                 {"first"=>"DEF", "last"=>"Z", "data"=>"VTA",
>                     "Xcode"=>"F17", "type"=>"G_TRD"},
>                 {"first"=>"EDF", "last"=>"FR" , "data"=>"CFC",
>                     "Xcode"=>"F17", "type"=>"T_900"}]}
> 
> 
> chk_answer = ["F15;first;01;last;;data;ATX;Xcode;F15;type;G_TRD",
>                "F15;first;Aero;last;Z;data;VTA;Xcode;F15;type;H_TGFE",
>                "F15;first;digg;last;;data;GFC;Xcode;F15;type;T_1000",
>                "F17;first;X01;last;Sx;data;ATT;Xcode;F17;type;H_TGFE",
>                "F17;first;DEF;last;Z;data;VTA;Xcode;F17;type;G_TRD",
>                "F17;first;EDF;last;FR;data;CFC;Xcode;F17;type;T_900" ]
> 
> #~~~
> res = []  # results
> 
> input.sort.each do |k1,a1|
>    a1.each do |h|
>      out = '' << k1
>      ['first', 'last', 'data', 'Xcode', 'type'].each do |k2|
>        out << sprintf(';%s;%s', k2, h[k2])  # append to string
>      end
>      res << out  # push line into result array
>    end
> end
> #~~~
> 
> puts '***  C o r r e c t  ***' if res == chk_answer
> puts res
> 
> ###========================
> 
> # :)
> 
> daz

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