Learning GO

strings/go.mod

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+module main
+
+go 1.26.5

strings/lineofwords.txt

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+There was a kid named Sami, and his sister Leena.

strings/postProg.txt

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+There was a kid named Sami, and his sister Girl.

strings/string_course.go

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+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	// s := "élite"
+	//
+	// fmt.Printf("%8T %[1]v %d\n", s, len(s))
+	// r := []rune(s)
+	// fmt.Printf("%8T %[1]v %d\n", r, len(r))
+	// b := []byte(s)
+	// fmt.Printf("%8T %[1]v %d\n", b, len(b))
+
+	// s := "The Quick brown fox"
+	//
+	// length := len(s)
+	//
+	// b := s[:3]
+	// c := s[3:9]
+	// d := s[:4] + "Fast" + s[9:]
+	//
+	// s += "es"
+	//
+	// fmt.Println(length)
+	// fmt.Println(b)
+	// fmt.Println(c)
+	// fmt.Println(d)
+	// fmt.Println(s)
+
+	if len(os.Args) < 3 {
+		fmt.Fprintln(os.Stderr, "Not enough args")
+		os.Exit(-1)
+	}
+
+	old, replacemnt := os.Args[1], os.Args[2]
+	scan := bufio.NewScanner(os.Stdin)
+
+	for scan.Scan() {
+		s := strings.Split(scan.Text(), old)
+		t := strings.Join(s, replacemnt)
+
+		fmt.Println(t)
+	}
+}