Created
August 8, 2014 19:41
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Flatten ruby hash, Could be used to convert nested ruby hash (or json) to csv
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def flatten_hash(hash, results = {}, parent_key = '') | |
return results unless hash.kind_of?(Hash) | |
hash.keys.each do |key| | |
# current_key = "#{parent_key}[#{key}]" # uncomment this if you want to keep parent key as a partof key for flattened hash (csv column name) | |
current_key = key | |
if hash[key].kind_of?(Hash) | |
results = flatten_hash(hash[key], results, current_key) | |
else | |
if hash[key].kind_of?(Array) | |
results[current_key] = hash[key].reject(&:empty?).join("; ") | |
else | |
results[current_key] = hash[key] | |
end | |
end | |
end | |
results | |
end |
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