prune todo for final turn in
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todo.yaml
59
todo.yaml
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@ -2,7 +2,6 @@ todo:
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- review readme tail to finish // answer 3 questions, gofmt
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- review readme tail to finish // answer 3 questions, gofmt
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- todo: go test
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- todo: go test
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subtasks:
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subtasks:
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- TestAnalyzer_TransactionsFromURLs
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- TestAnalyzer_TransactionsFromURLsConcurrent
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- TestAnalyzer_TransactionsFromURLsConcurrent
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- amount.go:Rounded probably does NOT handle float precision well... it is float64
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- amount.go:Rounded probably does NOT handle float precision well... it is float64
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tho...
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tho...
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@ -1643,3 +1642,61 @@ done:
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* which is bombing because transaction implements fmt.Stringer
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* which is bombing because transaction implements fmt.Stringer
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* nope turned out that didnt matter though it was sketchy
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* nope turned out that didnt matter though it was sketchy
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ts: Sun Oct 15 13:42:02 MDT 2023
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ts: Sun Oct 15 13:42:02 MDT 2023
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- todo: go test
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subtasks:
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- TestAnalyzer_TransactionsFromURLs
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- TestAnalyzer_TransactionsFromURLsConcurrent
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- amount.go:Rounded probably does NOT handle float precision well... it is float64
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tho...
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- my `go mod tidy` actually cleared `go.mod` file, probably weird localhost backwards
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compatilble stuff
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- transaction.go:Transaction:String not clear if FormatUSD or amount currency should
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not be changed, or even what currency Amount is
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- transaction.go:Transaction:Sum again doesnt care about Amount currency or vendor/vendee
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drift
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- analyzer.go:Analyzer:LargestTransaction doesn't specify how to break ties; stable
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or latest?
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- analyzer.go:Analyzer:Add should dedupe transactions added, but transactions.go:FromFile
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will load duplicate transactions from json file so hmmmm
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- todo: analyzer.go:Analzyer:Add dedupes each transaction, which is O(n**2)
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details: |
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* BUT there's no indicator whether order of the array matters, so it's unsafe for me to sort/heapify that stuff
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* OR I can store a second copy of all entries in a map, but that risks drift syncing the two
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* SO I could create a UniqueTransactions struct {
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transactions []Transaction
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dedupes map[Transaction]struct{}
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}
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but that's just doubling RAM usage in a thing that sounds like it could scale infinitely over time
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SO I could do a [hash(Transaction)][]*Transaction and compare just a subset. Because it's in RAM and computed live, the hash cardinality could be changed on any release
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<------------------ if I have time, do this
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- analyzer.go:Analyzer:Add dedupes but what is a duplicate transaction? Transactions
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can be pending and then later disappear to have their date updated OR be like
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pre-charges on credit cards that later disappear
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- analyzer.go:Analyzer:Add is not concurrency-safe
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- analyzer.go:Analyzer:ByCategory probably allocates big slices out the gate and
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expends to way-too-big-slices by end time. Could do 2 passes (still O(n)) to pre-compute
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each category's size. Makes code look weird, though. Hm.
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- analyzer.go:Analyzer:Largest should be an anz.transactions.Max() to match Sum
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- analyzer.go:Analyzer:Count should be an anz.transactions.Len() to match Sum
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- analyzer.go:Analyzer:tranasctionsMean I ASSUME arithmetic mean (sum/count), but
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could be another mean not specified (ie geometric)
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- analyzer.go:Analyzer:BigSpendersReport assumes no overlapping FirstInitial LastName
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cardholders
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- transactions.go:TransactionsFromURLs needs streaming json parsing
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- todo: transactions.go:TransactionsFromURLs count
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details: |
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* curl+jq reveals 983 unique transactions.
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* My code yields 1000 and test asserts 980 (added to localfile of 188). My equality must be broken and test's must be flexible. curl+jq on file and remote confirm
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* it's 1171 transactions. Equaility must not be waht I expect. Gotta look at individual transactions to find what is specified that doesnt match.
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* May be float problems,
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* nope, set up a UnmarshalJSON to compare each unmarshalled float vs input and it looks K
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* may be time zones...
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* or casing...
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* strings.ToLower(fmt.Sprint(trn)) == strings.ToLower(fmt.Sprint(other)) deduped some file-based transactions but still yielded all 1000 from remote
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* which is bombing because transaction implements fmt.Stringer
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* nope turned out that didnt matter though it was sketchy
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$ curl -sS https://assets.digits.com/uploads/hiring/swift-work-sample/transactions-aa.json | jq -c .[] | grep -A 1 -B 1 73.68.*Munday
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{"AgencyName":"OKLAHOMA STATE UNIVERSITY","AgencyNumber":"1000","Amount":"73.68","CardholderFirstInitial":"T","CardholderLastName":"Munday","Description":"3 KA 3206 1 9 EAC","MerchantCategory":"ELECTRICAL PARTS AND EQUIPMENT","PostedDate":"07/31/2013 12:00:00 AM","TransactionDate":"07/11/2013 12:00:00 AM","Vendor":"ANIXTER INC","YearMonth":"201307"}
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{"AgencyName":"OKLAHOMA STATE UNIVERSITY","AgencyNumber":"1000","Amount":"73.68","CardholderFirstInitial":"T","CardholderLastName":"Munday","Description":"3 KA 0324 EAC","MerchantCategory":"ELECTRICAL PARTS AND EQUIPMENT","PostedDate":"07/31/2013 12:00:00 AM","TransactionDate":"07/11/2013 12:00:00 AM","Vendor":"ANIXTER INC","YearMonth":"201307"}
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* I think the answer key wrongly deduped these similar but different description transactions
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ts: Sun Oct 15 13:48:03 MDT 2023
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