We are given two strings, say s and t. String t is generated by random shuffling string s and then add one more letter at a random position.
We are required to write a JavaScript function that takes both these strings and returns the letter that was added to t.
For example −
If the input stings are −
const s = "abcd", t = "abcde";
Then the output should be −
const output = "e";
because 'e' is the letter that was added.
Example
const s = "abcd", t = "abcde"; const findTheDifference = (s, t) => { let a = 0, b = 0; let charCode, i = 0; while(s[i]){ a ^= s.charCodeAt(i).toString(2); b ^= t.charCodeAt(i).toString(2); i++; }; b^=t.charCodeAt(i).toString(2); charCode = parseInt(a^b,2); return String.fromCharCode(charCode); }; console.log(findTheDifference(s, t));
Output
And the output in the console will be −
e