test

 const Contacts = (function() {
    function Contacts(){};
    var arr = [];

    // add a contact to the contacts list
    Contacts.prototype.add = function(contact) {
        arr.push(contact);
        console.log('added!');
    };

    //returns the number of contacts that start with the term
    Contacts.prototype.count = function(term) {
        var cContacts = 0;
        for(var i=0; i<arr.length; i++){
            if(arr[i].indexOf(term) === 0){
                cContacts++;
            }
        }
        // arr.reduce((currctValue, contact) => contact.indexOf(term) === 0 ? currctValue + 1 : currctValue, 0)
      return cContacts;
    };
    return Contacts;
})();


const contacts = new Contacts();
contacts.add('tsachi');
console.log(contacts.count('tsachi'));