Check if an array contains any element of another array in JavaScript

Question

I have a target array [\"apple\",\"banana\",\"orange\"], and I want to check if other arrays contain any one of the target array elements.

For example:

Answer 1

Using filter/indexOf:

function containsAny(source,target)
{
    var result = source.filter(function(item){ return target.indexOf(item) > -1});   
    return (result.length > 0);  
}    


//results

var fruits = ["apple","banana","orange"];


console.log(containsAny(fruits,["apple","grape"]));

console.log(containsAny(fruits,["apple","banana","pineapple"]));

console.log(containsAny(fruits,["grape", "pineapple"]));