Ledger

How to use (with both the source code and ledger file present in the current directory):

• From the command line:

  ruby ledger.rb ledger.csv

  (this will simply print the underlying data structures)

• In irb or from code:

     > $:.unshift '.'
     > require "ledger"
     > ledger = Ledger.new "ledger.csv"
     > ledger.balance_for "john"
     > ledger.statement_on "2015-01-17", "john"
     > day = Date.new("2015-01-17")
     > ledger.statement_on day, "john"

  Additionally, the auxiliary instance methods Ledger.dump, Ledger.entries, and Ledger.balances can be used to inspect the data.