implement O(n**2) analyzer.go:Analyzer:Add mvp

digits-work-sample-go.d/analyzer.go

@@ -8,7 +8,17 @@ type Analyzer struct {
 
 // Add adds unique transactions to Analyzer.
 func (anz *Analyzer) Add(transactions Transactions) int {
-	anz.transactions = append(anz.transactions, transactions...)
+	for i := range transactions {
+		dupe := false
+		for j := range anz.transactions {
+			if transactions[i] == anz.transactions[j] {
+				dupe = true
+			}
+		}
+		if !dupe {
+			anz.transactions = append(anz.transactions, transactions[i])
+		}
+	}
 	return len(transactions)
 }
 

todo.yaml

@@ -19,6 +19,11 @@ todo:
     or latest?
   - analyzer.go:Analyzer:Add should dedupe transactions added, but transactions.go:FromFile
     will load duplicate transactions from json file so hmmmm
+  - analyzer.go:Analzyer:Add dedupes each transaction, which is O(n**2) to compare
+    each input with each existing entry
+  - analyzer.go:Analyzer:Add dedupes but what is a duplicate transaction? Transactions
+    can be pending and then later disappear to have their date updated OR be like
+    pre-charges on credit cards that later disappear
 scheduled: []
 done:
 - todo: hello world
@@ -508,3 +513,23 @@ done:
   - analyzer.go:Analyzer:LargestTransaction doesn't specify how to break ties; stable
     or latest?
   ts: Sun Oct 15 11:40:52 MDT 2023
+- todo: go test
+  subtasks:
+  - TestAnalyzer_DuplicatesExcluded
+  - TestAnalyzer_GroupByCategory
+  - TestAnalyzer_BigSpendersReport
+  - TestAnalyzer_TransactionsFromURLs
+  - TestAnalyzer_TransactionsFromURLsConcurrent
+  - amount.go:Rounded probably does NOT handle float precision well... it is float64
+    tho...
+  - my `go mod tidy` actually cleared `go.mod` file, probably weird localhost backwards
+    compatilble stuff
+  - transaction.go:Transaction:String not clear if FormatUSD or amount currency should
+    not be changed, or even what currency Amount is
+  - transaction.go:Transaction:Sum again doesnt care about Amount currency or vendor/vendee
+    drift
+  - analyzer.go:Analyzer:LargestTransaction doesn't specify how to break ties; stable
+    or latest?
+  - analyzer.go:Analyzer:Add should dedupe transactions added, but transactions.go:FromFile
+    will load duplicate transactions from json file so hmmmm
+  ts: Sun Oct 15 11:44:18 MDT 2023