передача функции как аргумента другой функции

go-demo-4/account/account.go

@@ -21,7 +21,7 @@ type Account struct {
 // метод вывода пароля
 func (acc *Account) Output() {
 	c := color.New(color.FgRed, color.Italic, color.Bold)
-	c.Printf("password: %v, login: %v, URL: %v\n", acc.Password, acc.Login, acc.Url)
+	c.Printf("password: %v\nlogin: %v\nURL: %v\n", acc.Password, acc.Login, acc.Url)
 }
 
 // метод генерации пароля

go-demo-4/account/vault.go

@@ -73,10 +73,10 @@ func (vault *Vault) ToBytes() ([]byte, error) {
 	return file, nil
 }
 
-func (vault *VaultWithDb) FindAccountsByUrl(url string) []Account {
+func (vault *VaultWithDb) FindAccounts(str string, checker func(Account, string) bool) []Account {
 	var accounts []Account
 	for _, account := range vault.Accounts {
-		isMatched := strings.Contains(account.Url, url)
+		isMatched := checker(account, str)
 		if isMatched {
 			accounts = append(accounts, account)
 		}