Question

I wrote a transform to capture one of the following words: “first”, “second”, “third”, or “fourth” representing quarters of a year. Here’s what I wrote, I was hoping there might be a much simpler way of doing this. Any thoughts?

CAPTURE_QUARTER = Transform /^(first|second|third|fourth)$/ do |quarter|
  case quarter
    when 'first'
      1
    when 'second'
      2
    when 'third'
      3
    when 'fourth'
      4
  end
end

Thanks in advance!

UPDATE:
Possible solution:

CAPTURE_QUARTER = Transform /^(first|second|third|fourth)$/ do |quarter|
  {first: 1, second: 2, third: 3, fourth: 4}[quarter.to_sym]
end

Thoughts on this one?

Answer 1

I can suggest you yet another way of doing that:

quarters = {first: 1, second: 2, third: 3, fourth: 4}
CAPTURE_QUARTER = Transform /^(first|second|third|fourth)$/ do |quarter|
  quarters[quarter.to_sym]
end