124 lines
2.3 KiB
Go
124 lines
2.3 KiB
Go
package main
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import (
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"bufio"
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"flag"
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"fmt"
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"io"
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"os"
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"strings"
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"time"
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)
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type ByteCount int
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func (bc *ByteCount) Write(p []byte) (n int,err error) {
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*bc = ByteCount(len(p))
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return len(p),nil
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}
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type WordsNum int
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func (wn *WordsNum) Write(p []byte) (n int,err error) {
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*wn = WordsNum(len(p))
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return len(p),nil
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}
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func Count() []byte {
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scanner := bufio.NewScanner(os.Stdin)
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fmt.Print("Enter text here: ")
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if scanner.Scan() {
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line := scanner.Text()
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wordCount := bufio.NewScanner(strings.NewReader(line))
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wordCount.Split(bufio.ScanWords)
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wordsNum := []byte{}
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for wordCount.Scan() {
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wordsNum = append(wordsNum, 1)
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fmt.Println("Word is: ",wordCount.Text())
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}
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fmt.Printf("Amount of words is %d\n",wordsNum)
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return wordsNum
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}
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return nil
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}
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type NewWriter struct {
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writer io.Writer
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counter *int64
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}
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func (nw *NewWriter) Write(p []byte) (n int,err error) {
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n,err = nw.writer.Write(p)
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fmt.Println()
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*nw.counter = int64(n)
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return n,err
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}
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func CountingWriter(w io.Writer) (io.Writer, *int64) {
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counter := int64(0)
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return &NewWriter{
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writer: w,
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counter: &counter,
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},&counter
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}
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// Упражнения на возврат LimitReader
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func GetNewReader(s string) io.Reader {
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return strings.NewReader(s)
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}
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type MyReader struct {
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reader io.Reader
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constraint int
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}
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func (nr MyReader) Read(p []byte) (n int,err error) {
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n,err = nr.reader.Read(p[:nr.constraint])
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return
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}
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func LimitReader(r io.Reader,n int) io.Reader {
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return MyReader{
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reader: r,
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constraint: n,
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}
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}
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// Проверка, что ByteCount действительно соответствует интерфейсу io.Writer
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var _ io.Writer = new(ByteCount)
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var period = flag.Duration("period",1 * time.Second,"sleep period")
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func main() {
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flag.Parse()
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fmt.Printf("Waiting %v...",period)
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time.Sleep(*period)
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fmt.Println()
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// var bc ByteCount
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// bc.Write([]byte("Hello dodik"))
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// fmt.Println(bc)
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// var wn WordsNum
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// wn.Write(Count())
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// fmt.Println(wn)
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// writer,count := CountingWriter(os.Stdout)
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// writer.Write([]byte("Hello Baga"))
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// fmt.Printf("Bytes %d",*count)
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// str := "hello"
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// buf := make([]byte,100)
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// reader := LimitReader(strings.NewReader(str),3)
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// // n,_ := reader.Read(buf)
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// // reader := strings.NewReader(str)
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// n,_ := reader.Read(buf)
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// fmt.Printf("Result is %d\n",n)
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// fmt.Printf("String is %s",string(buf))
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}
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