sadf

book_with_bridge/func_in_func/go.mod

@@ -0,0 +1,3 @@
+module main
+
+go 1.25.5

book_with_bridge/func_in_func/main.go

@@ -0,0 +1,50 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+)
+
+func findSub(s, sub, repl string) (finStr string) {
+	if len(s) < len(sub) {
+		return s[:]
+	}
+
+	found := false
+	currCount := 0
+	newStr := ""
+
+	if s[:len(sub)] == sub {
+		newStr = repl
+		currCount++
+		found = true
+		// return
+	} else {
+		newStr = string(s[0])
+	}
+
+	var resStr string
+
+	if found {
+		resStr = findSub(s[len(sub):], sub, repl)
+	} else { 
+		resStr = findSub(s[1:],sub,repl) 
+	}
+
+	return  newStr + resStr
+}
+
+func expand(s,sub,repl string, f func(init string,sub string,repl string) string) string{
+	res := f(s,sub,repl)
+	return res
+}
+
+func main() {
+	str := flag.String("str", "lolkeklolkeklol", "Initital string")
+	sub := flag.String("sub", "kek", "substring to find")
+	repl := flag.String("repl", "puk", "String to replace with")
+
+	// res := findSub(*str, *sub, *repl)
+	res := expand(*str,*sub,*repl,findSub)
+	fmt.Println(res)
+}