comparing two arrays before adding an item from one array to another in JavaScript [closed]

Answer 1

https://jsfiddle.net/povvx8hg/

var addFrom = ["orange", "banana", "watermelon", "lemon", "peach"];
var addTo = ["pear", "tangerine", "grape", "orange", "blueberry"];

for (i = 0; i < addFrom.length; i++) {
    if(addTo.indexOf(addFrom[i]) != -1) {
    console.log("Exist");
  } else {
    addTo.push(addFrom[i]);
  }
}

console.log(addTo);