improve readability of the web package

web/utils.go

@@ -0,0 +1,26 @@
+package web
+
+// Functions used in the HTML templates
+
+import (
+	"fmt"
+)
+
+// Subtracts two integers
+func sub(a int, b int) int {
+	return a - b
+}
+
+// Adds two integers
+func add(a int, b int) int {
+	return a + b
+}
+
+// Put a comma in the thousands place, ten-thousands place etc.
+func formatInt(n int) string {
+	if n < 1000 {
+		return fmt.Sprintf("%d", n)
+	} else {
+		return formatInt(n/1000) + "," + fmt.Sprintf("%03d", n%1000)
+	}
+}