Finding unlike number in an array - JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

We are required to write a JavaScript function that takes in an array of literals containing all similar elements but one. Our function should return the unlike number.

Example

Following is the code −

const arr = [2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4];
// considering that the length of array is atleast 3
const findUnlike = arr => {
   for(let i = 1; i < arr.length-1; i++){
      if(arr[i] - arr[i-1] !== 0 && arr[i]-arr[i+1] === 0){
         return arr[i-1];
      }else if(arr[i] - arr[i-1] !== 0 && arr[i]-arr[i+1] === 0){
         return arr[i]
      }else if(arr[i] - arr[i-1] === 0 && arr[i]-arr[i+1] !== 0){
         return arr[i+1];
      };
      continue;
   };
};

Output

Following is the output in the console −

2
raja
Published on 18-Sep-2020 08:56:54
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