Golang React JS Technology Blog

Example: How to use TeeReader from IO Package in Golang?

TeeReader returns a Reader that writes to w what it reads from r. All reads from r performed through it are matched with corresponding writes to w.

Example

package main

import (
	"bytes"
	"io"
	"fmt"
	"strings"
)

func main() {
	testString := strings.NewReader("Jobs, Code, Videos and News for Go hackers.")
	var bufferRead bytes.Buffer
	example := io.TeeReader(testString, &bufferRead)
	readerMap := make([]byte, testString.Len())
	length, err := example.Read(readerMap)
	fmt.Printf("\nBufferRead: %s", &bufferRead)
	fmt.Printf("\nRead: %s", readerMap)
	fmt.Printf("\nLength: %d, Error:%v", length, err)
}

Output

BufferRead: Jobs, Code, Videos and News for Go hackers.
Read: Jobs, Code, Videos and News for Go hackers.
Length: 43, Error:
Most Helpful This Week
Sample program to create csv and write data What is Rune? How to get ASCII value of any character in Go? How to set, get, and list environment variables? How to check if a string contains only letters in Golang? Convert Int data type to Int16 Int32 Int64 How to count number of repeating words in a given String?