How to Use io.Pipe in Go

Use io.Pipe() to create a connected pair of io.Reader and io.Writer that share a buffer, allowing one goroutine to write data while another reads it simultaneously.

pr, pw := io.Pipe()

// Writer goroutine
func() {
    defer pw.Close()
    pw.Write([]byte("hello"))
}()

// Reader goroutine
func() {
    buf := make([]byte, 5)
    pr.Read(buf)
    fmt.Println(string(buf))
}()

io.Pipe creates a private communication channel between two parts of your program running at the same time. Think of it like a digital tube where one side pours data in and the other side drinks it out instantly. You use this when you need to process a stream of data without saving it to a file first.