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document.write("<\/pre>\n");
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require<\/span> \'set\'<\/span><\/span>\n");
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document.write("def<\/span> merge_hashes<\/span>(first, second<\/span>)<\/span>\n");
document.write("  #The new hash has the keys of both hashes combined.<\/span>\n");
document.write("  keys =<\/span> Set<\/span>.new<\/span>(first.keys.concat(second.keys))\n");
document.write("  result_hash =<\/span> {}\n");
document.write("  keys.each do <\/span>|k<\/span>|\n");
document.write("    first_value =<\/span> first[k]\n");
document.write("    second_value =<\/span> second[k]\n");
document.write("    if<\/span> first_value.is_a? Hash<\/span> and<\/span> second_value.is_a? Hash<\/span>\n");
document.write("      #when they are both hashes we will recursively merge_hash<\/span>\n");
document.write("      result_hash[k] =<\/span> merge_hashes first_value, second_value\n");
document.write("    elsif<\/span> first_value ==<\/span> nil<\/span> or<\/span> second_value ==<\/span> nil<\/span>\n");
document.write("      #when one of them is nil, we only have one value<\/span>\n");
document.write("      result_hash[k] =<\/span> first_value ||<\/span> second_value\n");
document.write("    elsif<\/span> first_value.is_a? Array<\/span> or<\/span> second_value.is_a? Array<\/span>\n");
document.write("      #when one or both are an array, we concatenate them<\/span>\n");
document.write("      result_hash[k] =<\/span> first_value.to_a.concat(second_value.to_a)\n");
document.write("    else<\/span>\n");
document.write("      #when they both have a value we make an array containing them<\/span>\n");
document.write("      result_hash[k] =<\/span> [first_value, second_value]\n");
document.write("    end<\/span>\n");
document.write("  end<\/span>\n");
document.write("  result_hash\n");
document.write("end<\/span>\n");
document.write("<\/pre><\/pre>\n");
document.write("		<\/td>\n");
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document.write("	<\/div>\n");
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document.write("result: <\/h2>\n");
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document.write("		a=<\/span>{"a"<\/span>=>{"b"<\/span>=>["c"<\/span>]}}\n");
document.write("b=<\/span>{"a"<\/span>=>{"b"<\/span>=>["e"<\/span>]}}\n");
document.write("merge_hashes(a,b)\n");
document.write("#=> {"a"=>{"b"=>["c", "e"]}}<\/span>\n");
document.write("<\/pre><\/pre>\n");
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document.write("      <\/a>\n");
document.write("    <\/div>\n");
document.write("  \n");
document.write("    Pastie #866741<\/a> linked directly from Pastie<\/a>.\n");
document.write("  <\/div><\/div>");