I have this code and I need to refactor that
I tried creating a new function and passing it through reduce but It doesn't work
function fx(n) {
let d= (new Array(n+1)).join('x').split('').reduce((d,v,i)=>{
let J=2*i+1+(i&1)
return d += J+(J+1-2*i+1)
},-1-Math.floor(n/2) * 2);
return d-(n-2);
};This is what it should be doing.
const squareIncrement = number => Math.pow(Math.abs(number) + 1, 2);