Question

How to swap pairs of characters in a string with Node.js

Answer 1

function SwapPairs(str) {
    if (str == null || (str.length === 0)) {
        return str;
    }
    
    let arr = str.split('');
    
    for (let i = 0; i < arr.length - 1; i += 2) {
        let tmp = arr[i];
        arr[i] = arr[i + 1];
        arr[i + 1] = tmp;
    }
    
    return arr.join("");
}

const str = "aBcDeFgHiJkLmN";
    
console.log(SwapPairs(str));





/*
run:

BaDcFeHgJiLkNm

*/

 

70+ SQL courses for beginners and professionals