https://golang.k5kc.com/tags/writer/Recent content in writer on GolangHugo -- gohugo.ioen-usSun, 16 Aug 2020 00:10:00 +0530https://golang.k5kc.com/2020/08/16/io-writer-interface/Sun, 16 Aug 2020 00:10:00 +0530https://golang.k5kc.com/2020/08/16/io-writer-interface/The inverse of io.Reader is io.Writer interface: type Writer interface { Write(p []byte) (n int, err error) } Compared to io.Reader, since you no need to consider io.EOF error, the process of Write method is simple: (1) err == nil: All the data in p is written successfully; (2) err != nil: The data in p is partially or not written at all. Let’s see an example: package main import ( "log" "os" ) func main() { f, err := os.