Question

How to create an array containing a range of characters in JavaScript

Answer 1

function createCharRangeArray(startChar, endChar) {
    let charArray = [];
    
    for (let i = startChar.charCodeAt(0); i <= endChar.charCodeAt(0); i++) {
        charArray.push(String.fromCharCode(i));
    }
    
    return charArray;
}

let charRange = createCharRangeArray('a', 'm');

console.log(charRange); 

 
       
/*
run:
       
[
  'a', 'b', 'c', 'd',
  'e', 'f', 'g', 'h',
  'i', 'j', 'k', 'l',
  'm'
]
       
*/

 

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Answer 2

function createCharRangeArray(startChar, endChar) {
    let start = startChar.charCodeAt(0);
    let end = endChar.charCodeAt(0);
    
    return Array.from({ length: end - start + 1 }, (_, i) => String.fromCharCode(start + i));
}

let charRange = createCharRangeArray('a', 'm');

console.log(charRange); 


 
       
/*
run:
       
[
  'a', 'b', 'c', 'd',
  'e', 'f', 'g', 'h',
  'i', 'j', 'k', 'l',
  'm'
]
       
*/

 

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Answer 3

function createCharRangeArray(startChar, endChar) {
    let start = startChar.charCodeAt(0);
    let end = endChar.charCodeAt(0);
    
    return [...Array(end - start + 1).keys()].map(i => String.fromCharCode(start + i));
}

let charRange = createCharRangeArray('a', 'm');

console.log(charRange); 


 
       
/*
run:
       
[
  'a', 'b', 'c', 'd',
  'e', 'f', 'g', 'h',
  'i', 'j', 'k', 'l',
  'm'
]
       
*/

 

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