reg prints balance per xaction now

cmd/cli/main.go

@@ -88,24 +88,17 @@ func Main() {
 
 		FPrintBalances(os.Stdout, balances)
 	case "reg":
-		register := deltas.Register()
+		transactions := deltas.Transactions()
 		if likePattern != "" {
-			register = register.Like(likePattern)
+			transactions = transactions.Like(ledger.LikeName(likePattern))
 		}
 		if notLikePattern != "" {
-			register = register.NotLike(notLikePattern)
+			transactions = transactions.NotLike(ledger.NotLikeName(notLikePattern))
 		}
 
-		var prev ledger.Balances
-		for _, date := range register.Dates() {
-			balances := register[date]
-
-			if newBalances := balances.Sub(prev).Nonzero(); len(newBalances) > 0 {
-				fmt.Println(date)
-				FPrintBalances(os.Stdout, newBalances)
-			}
-
-			prev = balances
+		for _, transaction := range transactions {
+			fmt.Println(transaction[0].Date)
+			FPrintBalances(os.Stdout, ledger.Deltas(transaction).Balances())
 		}
 	default:
 		panic("unknown command " + positional[0])

src/ledger/like.go

@@ -41,6 +41,13 @@ func LikeNotName(pattern string) Like {
 	}
 }
 
+func NotLikeName(pattern string) Like {
+	foo := LikeName(pattern)
+	return func(d Delta) bool {
+		return !foo(d)
+	}
+}
+
 func LikeName(pattern string) Like {
 	return func(d Delta) bool {
 		return like(pattern, d.Name)

src/ledger/transaction.go

@@ -42,6 +42,26 @@ func (deltas Deltas) Transactions() Transactions {
 	return result
 }
 
+func (transactions Transactions) NotLike(like ...Like) Transactions {
+	result := make(Transactions, 0, len(transactions))
+	for _, transaction := range transactions {
+		if matching := (Deltas)(transaction).Like(like...); len(matching) == 0 {
+			result = append(result, transaction)
+		}
+	}
+	return result
+}
+
+func (transactions Transactions) Like(like ...Like) Transactions {
+	result := make(Transactions, 0, len(transactions))
+	for _, transaction := range transactions {
+		if matching := (Deltas)(transaction).Like(like...); len(matching) > 0 {
+			result = append(result, transaction)
+		}
+	}
+	return result
+}
+
 func (transaction Transaction) Payee() string {
 	balances := Deltas(transaction).Balances()