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POHow do I extract array values from hashes?
 

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  1. POHow do I extract array values from hashes?
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    <p>I'm struggling with a data structures in Ruby.</p> <p>I have:</p> <pre><code>answers = [ {"val"=&gt;["6"], "comment"=&gt;["super"], "qid"=&gt;["2"]}, {"val"=&gt;["3"], "comment"=&gt;[""], "qid"=&gt;["1"]}, {"val"=&gt;["7"], "comment"=&gt;[""], "qid"=&gt;["4"]}, {"val"=&gt;["5", "6"], "comment"=&gt;["supera", "hmm"], "qid"=&gt;["1", "2"]}, {"val"=&gt;["5", "9"], "comment"=&gt;["super", "asdf"], "qid"=&gt;["1", "5"]} ] </code></pre> <p>I need the following arrays for the qid's, which should be unique, all over the hashes:</p> <pre><code>["2","1","4","5"] # note, value 2 exists two times and value 1, 3 times </code></pre> <p>The corresponding values should be summarized and divided through number of counts:</p> <pre><code>["12","13","7","9"] will be: ["6","4.3","7","9"] # 12/2 and 13/3 </code></pre> <p>The comments should be summarized as well:</p> <pre><code>[["super","hmm"],["","supera","super"],[""],["asdf"]] </code></pre> <p>I'm wondering if it's cool to put it together in an hash?</p> <p>So far I have:</p> <pre><code>a = Hash.new(0) answers.each.map { |r| r }.each do |variable| variable["qid"].each_with_index do |var, index| #a[var] &lt;&lt; { :count =&gt; a[var][:count] += 1 } #a[var]["val"] += variable["val"][index] #a[var]["comment"] = a[var]["comment"].to_s + "," + variable["comment"][index].to_s end end </code></pre> <p>I'm trying to generate data for <a href="http://www.highcharts.com/demo/bar-basic" rel="nofollow">Highcharts Demo - Basic bar</a>. The gem is <a href="https://github.com/michelson/lazy_high_charts" rel="nofollow">LazyHighCharts</a></p> <p>Any Ideas? Suggestions?</p> <p><strong>Edit:</strong></p> <p>Maybe I have to explain again the structure: there are questions id's (qid), each of them has a value and a comment, I am trying to calculate the average of the "val" hashes</p>
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    1. USPatrick Winkler
    1. USPatrick Winkler
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    1. COI don't follow your logic for the corresponding values. How are those being calculated? Are the comments in any order too?
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    2. COyes, the order is all over the same in the hash, there are different qid's ind different hashes. if I ask you for all comments of qid = 2? you get "super" and "hmm" right? the values of qid=2 are "6" and "6" divided by count(qid) (over all hashes)
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      1. USPatrick Winkler
 

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