convert digits to alphabets in javascript

One way to convert digits to alphabets in JavaScript is to create an array of the corresponding letters, then use a loop to replace each digit in a string with its corresponding letter.

Here's an example code:

index.tsx
const digitsToLetters = (str) => {
  const letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j'];
  let result = '';
  
  for (let i = 0; i < str.length; i++) {
    const char = str.charAt(i);
    
    if (char >= '0' && char <= '9') {
      result += letters[char];
    }
    else {
      result += char;
    }
  }
  
  return result;
};

// Example usage:
const myString = '123abc456def789';
const convertedString = digitsToLetters(myString);
console.log(convertedString); // "abcdejjjfghi"
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In the above code, we define a function called digitsToLetters which takes a string as its parameter. We then create an array letters containing the letters corresponding to 0-9.

We then create an empty string result to store our converted string, and use a for loop to iterate through each character in the input string. For each character, we check if it is a digit (0-9). If so, we use its integer value to index into the letters array and append the corresponding letter to our result string. If the character is not a digit, we simply append it to result as is.

Finally, we return the converted string.