Translation of Betterment format to Drake software format (as documented, then as discovered.)

mapping.rb

# This is the layout that Drake had documented (coming from Betterment format)
oldLayoutJustForReference = <<-LAYOUT
0,TSJ,"T"
1,F,""
2,State,""
3,City,""
4,Date Sold (MMDDYYYY),column[:f]
5,Date Acquired (MMDDYYYY),column[:e]
6,Proceeds,column[:g]
7,Cost,column[:h]
8,Fed W/H,column[:k]
9,Wash Sale,column[:j]
10,Type,column[:l][0]
11,Description,column[:a]
12,Loss Not Allowed,""
13,Basis Not Reported,""
14,Adj 1 Code,""
15,Adj 1,""
16,Adj 1 AMT,""
17,Adj 2 Code,""
18,Adj 2,""
19,Adj 2 AMT,""
20,Adj 3 Code,""
21,Adj 3,""
22,Adj 3 AMT,""
23,AMT Cost Basis,""
24,US Real Property sold by nonresident,""
LAYOUT

# This is the layout inferred from the bad import by Drake.
# Drake column
betterment_to_drake_layout = <<-LAYOUT
0,TSJ,"T"
1,F,""
2,State,""
3,City,""
4,Sold,data[:f]
5,Acquired,data[:e]
6,Short/Long,data[:l][0]
7,Symbol,data[:b]
8,Quantity,data[:c]
9,Proceeds,data[:g]
10,Loss Not Allowed,""
11,Cost,data[:h]
12,Fed W/H,data[:k]
13,Wash Sale,data[:j]
14,Description,data[:a]
LAYOUT

titles = []
layout = []
betterment_to_drake_layout.each_line do |line|
  column, title, value = line.split ','
  titles[column.to_i] = title
  layout[column.to_i] = value.chomp
end

ARGF.each_line do |line|
  data=Hash[(:a..:m).to_a.zip(line.split ',')]
  puts layout.map {|x| eval(x)}.join(',')
end