<pre class="shiki github-dark shaku"><code>/** * @param {number[]} arr * @returns number */function findSingle(arr) { let x=0; for(let i=0;i&lt;arr.length;i++){ x= x ^ arr[i] } return x;}</code></pre>

XOR approach

Given an array of integers, all integers appear twice except one integer, could you quickly target it ? const arr = [10, 2, 2 , 1, 0, 0, 10]findSingle…