Simple CSV-to-JSON with no external dependencies other than the default OS X Ruby install. Because I keep forgetting how to do this. Pipe through `jq` for prettier output.

csv2json.rb

#!/usr/bin/env ruby

require 'json'

# Beware, this doesn't support embedded escaped commas, but it does
# handle quotes around field values with spaces in them correctly.


class Array
  def to_h()

    # [[a, 1], [b, 2]...]  =>  {'a'=>1, 'b'=>2, ...}
    rval = {}
    for e in self do
      rval[e[0]] = e[1]
    end
    return rval
  end
end


def zapquotes(s)
  s = s.match(/^['"]*(.*)['"]*$/)[0]
  return s
end
  

line = gets  
headings = line.rstrip.split(/,/)

arr = []

while (1) do
  line = gets
  if (!line) then
    break
  end
  rec = line.rstrip.split(/,/)
  rec = rec.map {|e| zapquotes(e) }
  arr.push(headings.zip(rec).to_h)
end
 
puts arr.to_json