: Nothing to repeat

Asked May 02 '21 at 04:42

Active May 02 '21 at 04:48

Viewed 31 times

function sillyCipher(sentence, cipher) {
  let str = "";
  let keys = Object.keys(cipher);
  for (let key in cipher) {
    for (let i = 0; i < sentence.length; i++) {
      if (sentence[i] == key) {
        str = sentence.replace(new RegExp(key, "g"), cipher[key])
      }
    }
  }
  return str
}

console.log(sillyCipher("apple" , { a : "c", p : "x", l : "r", e : "o"}));

//i got SyntaxError: Invalid regular expression: /?/: Nothing to repeat could you help can't understand this error in the loop

edited May 02 '21 at 04:48

Nick Parsons

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asked May 02 '21 at 04:42

Zhandos

Can you share what `cipher` is? – Nick Parsons May 02 '21 at 04:44
console.log(sillyCipher("apple" , { a : "c", p : "x", l : "r", e : "o"})) – Zhandos May 02 '21 at 04:45
1

`key` has a value of `?` at some stage, this is the problem – Jaromanda X May 02 '21 at 04:46
@Zhandos I made you a code-snippet, you might want to edit it to reproduce your problem – Nick Parsons May 02 '21 at 04:48
@Nick Parsons ooo got it. Is it possible some how to add a backslash to the regexp variable? – Zhandos May 02 '21 at 04:49
yes, you add a ```\``` to key – Jaromanda X May 02 '21 at 04:53
You can, but you might find it easier to use `.replaceAll(key, cipher[key])` rather than worrying about escaping regular expressions – Nick Parsons May 02 '21 at 04:53

SyntaxError: Invalid regular expression: /?/: Nothing to repeat

0 Answers0