In this blog post, I will show you how to read a file in golang using bufio. Create a file with name test.txt and add the below contents,
ken thompson alan donovan brian kernighan
File Read Example
package main
import (
"fmt"
"os"
"bufio"
"strings"
)
func check(e error) {
if e != nil {
panic(e)
}
}
func main() {
type Name struct {
firstname string
lastname string
}
fmt.Print("Please enter file name: ")
in := bufio.NewReader(os.Stdin)
line,_ := in.ReadString('\n')
filename := strings.TrimSuffix(line,"\n")
s := make([]Name,0)
file, err := os.Open(filename)
check(err)
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
splitLine := strings.Split(string(line), " ")
nameStruct := Name {firstname: splitLine[0], lastname: splitLine[1]}
s = append(s,nameStruct)
}
fmt.Println("File context read via slice of Structs: ")
for i := 0; i < len(s); i++ {
fmt.Printf("%s\n", s[i])
}
}
This will read the file and the contents line by line and stores then in slice of struct then reads and prints them by delimiting each line with a space.
Output
Please enter file name: test.txt --------------------- FirstName | LastName --------------------- ken thompson alan donovan brian kernighan