mv /ana, /ledger to /src/

src/ledger/group.go

@@ -0,0 +1,30 @@
+package ledger
+
+import "regexp"
+
+type Group func(Delta) Delta
+
+type Groups []Group
+
+func (groups Groups) Each(d Delta) Delta {
+	for i := range groups {
+		d = groups[i](d)
+	}
+	return d
+}
+
+func GroupDate(pattern string) Group {
+	p := regexp.MustCompile(pattern)
+	return func(d Delta) Delta {
+		d.Date = p.FindString(d.Date)
+		return d
+	}
+}
+
+func GroupName(pattern string) Group {
+	p := regexp.MustCompile(pattern)
+	return func(d Delta) Delta {
+		d.Name = p.FindString(d.Name)
+		return d
+	}
+}