Rails - Jun 2013 - Good Rubyistic way Looking for.

Hi,

I love ruby,but it seems Ruby don''t me. :)

I actually doing some play with nokogiri methods since last 3 days.
Doing so I have ended up with the below code:

require ''nokogiri''

doc = Nokogiri::XML(<<-eohl)
<Stock>
    <Code>7052</Code>
    <Name>PADINI</Name>
    <StockDailyRecords>
        <PriceOpen>1.2</PriceOpen>
        <PriceChange>1.1</PriceChange>
        <PriceClose>10.0</PriceClose>
        <Volume>3000000L</Volume>
    </StockDailyRecords>
    <StockDailyRecords>
        <PriceOpen>1.3</PriceOpen>
        <PriceChange>1.2</PriceChange>
        <PriceClose>11.0</PriceClose>
        <Volume>5000000L</Volume>
    </StockDailyRecords>
</Stock>
eohl

doc.at_css("StockDailyRecords").children.map{|el| el.text.strip if
el.text.strip != "" }.compact
# => ["1.2", "1.1", "10.0",
"3000000L"]

but my code not seems to be a Rubyistic. Any good approach would anybody
give me? :)))

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Love U Ruby <lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> I actually doing some play with nokogiri methods since last 3 days.
> Doing so I have ended up with the below code:
> 
> require ''nokogiri''
> 
> doc = Nokogiri::XML(<<-eohl)
> <Stock>
>     <Code>7052</Code>
>     <Name>PADINI</Name>
>     <StockDailyRecords>
>         <PriceOpen>1.2</PriceOpen>
>         <PriceChange>1.1</PriceChange>
>         <PriceClose>10.0</PriceClose>
>         <Volume>3000000L</Volume>
>     </StockDailyRecords>
>     <StockDailyRecords>
>         <PriceOpen>1.3</PriceOpen>
>         <PriceChange>1.2</PriceChange>
>         <PriceClose>11.0</PriceClose>
>         <Volume>5000000L</Volume>
>     </StockDailyRecords>
> </Stock>
> eohl
> 
> doc.at_css("StockDailyRecords").children.map{|el| el.text.strip
if
> el.text.strip != "" }.compact
> # => ["1.2", "1.1", "10.0",
"3000000L"]
> 
> but my code not seems to be a Rubyistic. Any good approach would anybody
> give me? :)))
I actually do not have a clue what you mean by that? Did you not get
what you expected? If you did get what you expected, I don''t see
anything wrong with your code.... There are other ways to do that, of
course, but they''re not more idiomatic, if that''s what you
mean, and can
be much worse.

This could work as well:

doc.at_css("StockDailyRecords").children.map(&:text).map(&:strip).select{|el|
not el.empty?}

but it''s not *better*; It''s actually worse, IMO, because
it''s rolling
through the collection several times.

Yet another:

doc.at_css("StockDailyRecords").children.select do |el|
  el.text.strip!; el unless el.empty?
end

which has the side effect of changing the contents of doc, in my opinion
is dangerous.

And there''s inject/reduce, which can be even more arcance/opaque:

doc.at_css("StockDailyRecords").children.reduce([]) do |m,o| 
  o = o.text.strip
  m << o unless o.empty?
  m
end

Given time, I could probably come up with a few more. But that''s
moot. Your code is fine.

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Find the below code :

require ''nokogiri''

doc = Nokogiri::HTML(<<-eohl)
<div>
    <dt>
        Test 1
    </dt>
    <dd>
    </dd>
    <dt>
        Test 2
    </dt>
    <dd>
    foo
    </dd>
</div>
eohl


doc.search(''div'').children.reject(&:text?).map{|n| n.name
if
!n.child.to_str.strip.empty? }.compact
# => ["dt", "dt", "dd"]

Any short technique to generate the array `["dt", "dt",
"dd"]` ?

Thanks

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Love U Ruby wrote in post #1112338:
> doc.search(''div'').children.reject(&:text?).map{|n|
n.name if
> !n.child.to_str.strip.empty? }.compact
> # => ["dt", "dt", "dd"]
I found one shortest way using `css` rules :

doc.search("dt,dd").map{|n| n.name unless n.to_str.strip.empty? 
}.compact
# => ["dt", "dt", "dd"]

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not sure what this has to do with rails....

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