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How to Replace Letters With Position In Alphabet in javaScript?

I need to create a function that takes a string and replaces each letter with its appropriate position in the alphabet

JavaScript
1 Answer
Mohammad Qandeel
Answered
18

Try this function using indexOf() function 

function alphabetIndex(str) {
  const letters = 'abcdefghijklmnopqrstuvwxyz';
  return [...str.toLowerCase()]
    .filter(s => letters.includes(s))
   .map(s => letters.indexOf(s) + 1)
   .join(' ');
}

Example

alphabetIndex('abcd') // "1 2 3 4"

 

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