Question

How to create an array containing a range of characters in Node.js

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', 'h');
 
console.log(charRange); 
 
  
        
/*
run:
        
[
  'a', 'b', 'c',
  'd', 'e', 'f',
  'g', 'h'
]
        
*/

 

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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', 'h');
 
console.log(charRange); 
 
  
        
/*
run:
        
[
  'a', 'b', 'c',
  'd', 'e', 'f',
  'g', 'h'
]
        
*/

 

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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', 'h');
 
console.log(charRange); 
 
  
        
/*
run:
        
[
  'a', 'b', 'c',
  'd', 'e', 'f',
  'g', 'h'
]
        
*/

 

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