Question

How to swap two characters in string by index with JavaScript

Answer 1

function swap(str, left, right) {
    let arr = str.split('');
    
    let tmp = arr[left];
    arr[left] = arr[right];
    arr[right] = tmp;
    
    return arr.join('');
}
        
let str = "javascript";

str = swap(str, 1, 6);

console.log(str);



  
  
/*
run:
  
"jrvascaipt"
  
*/

 

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Answer 2

function swap(str, left, right) {
    return str.substring(0, left)
           + str[right]
           + str.substring(left + 1, right)
           + str[left]
           + str.substring(right + 1);
}
         
let str = "javascript";
 
str = swap(str, 1, 6);
 
console.log(str);
 
 
 
   
   
/*
run:
   
"jrvascaipt"
   
*/

 

70+ SQL courses for beginners and professionals

Answer 3

function swap(str, left, right) {
    let arr = str.split('');
     
    [arr[left], arr[right]] = [arr[right], arr[left]]
     
    return arr.join('');
}
         
let str = "javascript";
 
str = swap(str, 1, 6);
 
console.log(str);
 
 
   
   
   
/*
run:
   
"jrvascaipt"
   
*/

 

70+ SQL courses for beginners and professionals