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From: | Shankar Rao |
Subject: | Re: [O] How to cross reference more than two table columns? |
Date: | Sun, 11 Oct 2015 12:53:08 -0700 |
I have multiple savings accounts, some of which I want to partition into mutiple virtual "subaccounts" that don't merit their own savings account. I want to use org-mode tables to keep track how much money is each subaccount. Given the following table:#+TBLNAME: trans-150925| ! | Amount | From | To | Subacct ||---+--------+------------+------------+-------------|| | 50 | Short Term | Inbox | Bond || | 200 | Inbox | Short Term | Bond || | 120 | Gifts | Inbox | Baby Gifts || | 75 | Short Term | Inbox | Furnishings |In this example, I have accounts "Inbox", "Short Term", and "Gifts". Of these accounts, "Short Term" has two subaccounts "Bond" and "Furnishings", and "Gifts" has a subaccount "Baby Gifts". I want to create a function that given a subaccount name, calculates the net amount to be withdrawn/deposited to the subaccount. Note that "Inbox" doesn't have any subaccounts, which I want to use to determine if a given transaction is a withdrawal or deposit to the subaccount.I have created the following two functions to implement this:(defun sbr/org-lookup-trans (category date s-name r-name)(let* ((table (concat "trans-" date))(s-range (format "@I%s..@>%s" s-name s-name))(s-col (org-table-get-remote table s-range))(r-range (format "@I%s..@>%s" r-name r-name))(r-col (org-table-get-remote table r-range)))(org-lookup-all category s-col r-col)))(defun sbr/get-net-subacct (category date)(let* ((from-vec (sbr/org-lookup-trans category date "$Subacct" "$From"))(to-vec (sbr/org-lookup-trans category date "$Subacct" "$To"))(amount-vec (sbr/org-lookup-trans category date "$Subacct" "$Amount"))(from-inbox-ind <indices of all from-vec elements that equal "Inbox">) ; A(to-inbox-ind <indices of all to-vec elements that equal "Inbox">) ; B(adds amount-vec[from-inbox-ind]) ; C(subs amount-vec[to-inbox-ind])) ; D(calc-eval (if (zerop (length subs))adds(concat adds "-" subs)))))I need help filling in the pseudo code in lines A through D, namely:1. how to get a list of all indices of elements in a vector that satisfy a predicate?2. how to reference a vector by a list of indices?In this example the function should return the following values:(sbr/get-net-subacct "Bond" "150925") ==> 150(sbr/get-net-subacct "Furnishings" "150925") ==> -75(sbr/get-net-subacct "Baby Gifts" "150925") ==> -120How do I implement the above pseudocode functions? Is there a simpler way to accomplish this task?
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