How to check if an item is already existing in an array before push using angularjs

Question

I have three arrays:

• arr1=["14","16","1"] — where I am selecting
• arr2=["14"] — where I am comparing my selection from arr1
• arr3=[] — where I am pushing the value.

How will I be able to check if my selection does not exist in arr2?

For example I selected 14 from arr1, since it is already existing in arr2, the button will be disabled and should not be pushed in arr3.

Answer 1

That is a JavaScript relating question, not AngularJS. But may that answer your question:

if(arr2.indexOf("14") == -1){
  arr3.push("14");
}