Re: Ruby Quiz is Back - Challenge #1 - Read Comma-Separated Values (CSV) from the "Real World"

Hello,
    For inspiration here's a snippet posted on the reddit ruby thread
[1]. Thanks to Paul.


class CSV include Mealy initial_state(:start) { @line = []; @text = ''
} read(state: :start, on: "\n") transition(from: :start, to: :comment,
on: '#') transition(from: :comment, to: :start, on: "\n") read(state:
:comment) transition from: [:normal, :start], to: :quote, on: '"'
transition from: :quote, to: :normal, on: '"' transition(from: :start,
to: :normal, on: ',') { @line << '' } transition(from: :start, to:
:normal, on: ' ') transition(from: :start, to: :normal) { |c| @text <<
c } transition(from: :normal, to: :start, on: "\n") do emit @line <<
@text; @line = []; @text = '' end read state: :normal, on: ' '
read(state: :normal, on: ',') { @line << @text; @text = '' }
read(state: [ :normal, :quote ]) { |c| @text << c } finish { emit
@line unless @line.empty? } end def parse(text)
CSV.new.run(text.chars).entries end


Happy hacking and data wrangling with Ruby.


[1] https://old.reddit.com/r/ruby/comments/9sbbt3/ruby_quiz_is_back_a_fortnightly_programming/

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