javascript - 如何检查字符串是否包含在自定义字母表中？

Question

我想写一个这样的函数

let string = "s4D$XLssksXKKLX";

//this alphabet is in array, but i can convert to other
let alphabet = [s4L1Xl7CbKrTD8Uo_NPdVWiI9zpBfZMm20hJ$qA5kuQta36yFevxnYHcEGRjgwSO]

if (string is contained in alphabet)
   return true
else
   return false

有人可以帮助我吗？

谢谢大家!

Answer 1

indexOf 字符串方法正是这样做的:

let alphabet = "s4L1Xl7CbKrTD8Uo_NPdVWiI9zpBfZMm20hJ$qA5kuQta36yFevxnYHcEGRjgwSO";

function testString(input){
  if (alphabet.indexOf(input) > -1){
     return true;
  } else {
     return false ;
  } 
}

console.log(testString("s4D$XLssksXKKLX"));
console.log(testString("CbKrTD8U"));