Question

How to swap two characters in string by index with Node.js

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 = "node.js c c++";
 
str = swap(str, 1, 6);
 
console.log(str);
 
 
 
   
   
/*
run:
   
nsde.jo c c++
   
*/

 

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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 = "node.js c c++";
  
str = swap(str, 1, 6);
  
console.log(str);
  
  
  
    
    
/*
run:
    
nsde.jo c c++
    
*/

 

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