https://www.freecodecamp.org/challenges/diff-two-arrays.
Can I get help in following code or link is above. I am getting err messgaes as seen but do not understand how to solve them. I alos do not know if it works.
function diffArray(arr1, arr2) {
var newArr = arr1.concat(arr2).sort(); //join arr1 and arr2 then sort.
var myArr = [];
for(var i = 0; i < newArr.length; i++){
var x = newArr[i];
//value at index i.
//on following code my errors are 'bad assignment" and "expected a conditional expressions and instead saw an assignment" which I can not understand.
if(newArr.lastIndexOf(x) = i){
//in the same newArr find out last reoccurance of value at i, if it is same then 'push' in myArr.
myArr.push(x);
} //if..lastIndexOf is closing here
return myArr;
}//for loop is clsing here
}//function
diffArray([1, 2, 3, 5], [1, 2, 3, 4, 5]);