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