cal_file_parsing.rb

=begin
 My brother created a C++ app for parsing cal files (not calendars)
 and outputting the final matching data as a CSV. This is my attempt
 in Ruby. 

 Expected incoming format: some text files that match the regexp's in
 the list (e.g. "value=123")

 Expected output: CSV format, ordered according to the columns array.
=end
filename = "foo.cal"
str = IO.Read(filename)

#test example:
#str = "asdffdsdf\nsdsdfsuper=234 \n value=111 super=55 \nsuper=888 "
columns = [
    ["super", /super=(\d+)\s/],
    ["dooper", /value=(\w+)\s/]
  ]
result = {}
str.split("\n").each do |line|
  columns.each do |name_and_regexp|
    name, regexp = name_and_regexp
    if line =~ regexp
      result[name] = $1
    end
  end
end
headers = []
csv_row = []
columns.each do |name_and_regexp|
  name = name_and_regexp.first
  headers << name
  csv_row << result[name]
end
puts headers.join(",")
puts csv_row.join(",")
#Example output:
#  super,dooper
#  888,111