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PONested hash iteration: How to iterate a merge over an ( (array of hashes) within a hash )
 

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    <p>I'm trying to do as the title says. Here is my code:</p> <pre><code>school.each { |x| school[:students][x].merge!(semester:"Summer") } </code></pre> <p>I think I pinpointed the problem to the "[x]" above. If I substitute an array position such as "[2]" it works fine. How can make the iteration work?</p> <p>If the info above is not enough or you'd like to offer a better solution, please see the details below. Thanks!</p> <hr> <p>The error message I get:</p> <p><strong>file.rb:31:in <code>[]': no implicit conversion of Array into Integer (TypeError) from file.rb:31:in</code>block in ' from file.rb:31:in <code>each' from file.rb:31:in</code>'</strong></p> <p>The nested hash below before alteration:</p> <pre><code>school = { :name =&gt; "Happy Funtime School", :location =&gt; "NYC", :instructors =&gt; [ {:name=&gt;"Blake", :subject=&gt;"being awesome" }, {:name=&gt;"Ashley", :subject=&gt;"being better than blake"}, {:name=&gt;"Jeff", :subject=&gt;"karaoke"} ], :students =&gt; [ {:name =&gt; "Marissa", :grade =&gt; "B"}, {:name=&gt;"Billy", :grade =&gt; "F"}, {:name =&gt; "Frank", :grade =&gt; "A"}, {:name =&gt; "Sophie", :grade =&gt; "C"} ] } </code></pre> <p>I'm trying to append :semester=>"Summer" to each of the last four hashes. Here is what I'm trying to go for:</p> <pre><code># ...preceding code is the same. Changed code below... :students =&gt; [ {:name =&gt; "Marissa", :grade =&gt; "B", :semester =&gt; "Summer"}, {:name=&gt;"Billy", :grade =&gt; "F", :semester =&gt; "Summer"}, {:name =&gt; "Frank", :grade =&gt; "A", :semester =&gt; "Summer"}, {:name =&gt; "Sophie", :grade =&gt; "C", :semester =&gt; "Summer"} ] } </code></pre>
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