5.2 Functions to add/edit/delete/get transactions

• (leas/at account-name amount desc day)

  Adds a transaction to the account with name account-name with the transaction amount being amount, description desc, and day given as day (a list with three elements, in this order: day, month, year). This is a primitive function that does not add a counterbalancing transaction in any other account. Just adds or subtracts the amount from a certain account. It doesn’t take the money from anywhere.

• (leas/get-transactions account-name number)

  Returns the most recent number transactions from account-name. A transaction in Scheme is a five element list with elements in this order: (description amount year month day).

• (leas/get-all-transactions account-name)

  Returns all transactions from the account with name account-name.

• (leas/get-transactions-by-regex account-name regex)

  Returns all transactions from the account with name account-name where the transaction’s description matches the regular expression regex.

• (leas/get-transaction-by-location account-number transaction-number)

  Return the transaction from the account numbered account-number with the transaction numbered transaction-number.

• (leas/get-transactions-by-day account-name first-day last-day)

  Return the transactions from account account-name that occurred between first-day and last-day.

• (leas/t to-account from-account amount desc day)

  Create a transfer from one account to another by creating offsetting transactions in both accounts.

• (leas/dtr from-account to-location)

  Delete a transaction that went from from-account to to-location (a pair giving account number and transaction number).

• (leas/pay-loan loan-account interest-account from-account principal interest desc day)

  Create a loan payment transaction with takes money from from-account and pays interest to interest-account and principal to loan-account. The description and day of the transaction are given by the other two arguments.

• (leas/change-stock-price stock-account from-account stock-price number day)

  Updates the stock price to stock-price of a stock account taking the money from from-account (usually an income account called something like “Stock Income”). The stock account is assumed to hold number shares. The day is the day of the transaction.

• (leas/edit-transact transaction-location day amount desc)

  Edits the transaction at transaction-location (a pair of account number and transaction number) to have day, amount, and desc set to the given values.

• (leas/print-tscts tsct-list)

  Prints out a list of transactions in a pretty way (well, at least, in a standard way).