Question

How to generate a range of characters in JavaScript

Answer 1

function generate_range_of_characters(ch_from, ch_to) {
    let s = String.fromCharCode(...[...Array(ch_to.charCodeAt(0) - 
                                              ch_from.charCodeAt(0) + 1).keys()].
                                              map(i => i + ch_from.charCodeAt(0)));
     
    return s;
}
 
console.log(generate_range_of_characters('c', 'j'));
 
 
 
 
 
/*
run:
 
"cdefghij"
 
*/

 

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Answer 2

function generate_range_of_characters(ch_from, ch_to) {
    let s = "";
    for (let i = ch_from.charCodeAt(0); i <= ch_to.charCodeAt(0); i++) {
         s += String.fromCharCode(i);
    }
    return s;
}
  
console.log(generate_range_of_characters('c', 'j'));
  
  
  
  
/*
run:
  
"cdefghij"
  
*/

 

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