12. Files and Systems

Activity 12.01: Parsing Bank Transaction Files

Solution:

All directories and files created should be inside your $GOPATH.

1. Create a Chapter12/Activity12.01/ directory.
2. Inside Chapter12/Activity12.01/, create a main.go file.
3. Add the following code to the main.go file:

   package main
   import (
     "encoding/csv"
     "errors"
     "flag"
     "fmt"
     "io"
     "log"
     "os"
     "strconv"
     "strings"
   )

4. Create budget category types for fuel, food, mortgage, repairs, insurance, utilities, and retirement:

   type budgetCategory string
   const (
     autoFuel   budgetCategory = "fuel"
     food     budgetCategory = "food"
     mortgage   budgetCategory = "mortgage"
     repairs  budgetCategory = "repairs"...