CODEWITHSUNDEEP
typescript
Fanny Hasbi
Fanny Hasbi

Reputation: 257

Index signature in type 'String' only permits reading

I got this warning from variable cipher when I was trying to change a string character at specified index.

const emojis: string[] = [/* values */];

function revealOriginEmojis(cipher: string): string {
  for(let i = 0; i < cipher.length; i++){
    let index: number = emojis.indexOf(cipher[i]);

    cipher[i] = emojis[index];
  }

  return cipher;
}

So, should I create a new string variable or any better solutions? Thank you so much

Upvotes: 17

Views: 18313

Answers (1)

Yukul&#233;l&#233;
Yukul&#233;l&#233;

Reputation: 17062

A string is a primitive value, it's immutable.

you can convert it into array of chars, edit some elements of the array and convert back the array into string.

const cipherChars = [...cipher]; // convert into array

cipherChars[2] = 'X'; // alter array

cipher = cipherChars.join(''); // convert back into string

Upvotes: 25

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