CSV-to-json.rb

=begin
Converts:

# people.csv
Name, Age, Height
Ahmed, 12, 103
Mohamed, 19, 176

.. into:
# people.json
[
  {
    "name": "Ahmed",
    "age": 12, 
    "height": 103
  },
  {
    "name": "Mohamed",
    "age": 19, 
    "height": 176
  },
]
=end

def csv_to_json(file_in)
  csv = CSV.read(file_in, headers: true)
  json = []
  csv.each {|line| json << line.to_h }

  # write output
  file_out = file_in.gsub(/\.csv/, ".json")
  File.open(file_out, "w") {|f| f.write json.to_json }

  puts "✅ All done"
end