ChatGPT prompt 5

bar.rb

class Bar
    attr_accessor :time, :open, :high, :low, :close, :volume
    def initialize(time, open, high, low, close, volume)
        @time = time
        @open = open
        @high = high
        @low = low
        @close = close
        @volume = volume
    end
end

bar_reader.rb

require 'csv'
require 'date'
class BarReader
  include Enumerable
    def initialize(from_date, to_date)
        @from_date = from_date
        @to_date = to_date
    end

    def each
      Dir.glob("*.zip") do |file|
        date = Date.parse(file.split("_")[0])
        if date >= @from_date && date <= @to_date
          CSV.foreach(file, headers: false) do |row|
            time, open, high, low, close, volume = row
            yield Bar.new(time, open, high, low, close, volume)
          end
        end
      end
    end
end

question.txt

I have a directory with ZIP files with this format:

20050906_trade.zip
20050907_trade.zip
20050908_trade.zip

Where the first segment of the file name correspond with a date. That date represents a day with the minute bar data for the corresponding date and security. If you open the ZIP file you would find a CSV file with this format:

0,3847.50,3847.50,3847.00,3847.50,91
60000,3847.25,3847.50,3847.25,3847.25,106
120000,3847.25,3847.25,3846.75,3847.00,114
180000,3846.75,3846.75,3846.25,3846.25,78

The columns are, in this order, date (milliseconds from midnight), open, high, low, close and volume.

I would like to create two classes. A “Bar” class that captures a single OHLC bar that also includes the time and volume. And a “BarReader” class that you can use like this:

```
from_date = Date.parse("2021-01-1")
to_date = Date.parse("2022-01-1")
bar_reader = BarReader.new(from_date, to_date)
bars = bar_reader.to_a
```

In that example, “bars” would contain all the bars read from the corresponding files between the 2021-01-1 and 2022-01-1. I’d like to implement the “BarReader” class with an “each” method and include Enumerable.