no, their tests are not working, could you please solve this problem

Ohh woww cool solution ^^^

Ohh woww cool solution ^^^

Ohh woww cool man ^^^

Ohh woww cool man ^^^

My good solution :S

my good solution

Thx.

i should equal 1, there is no reason to compare arr[0] to itself.

O(nlogn)

Just wanted to fix the tests and try this kumite thing oout ;)

what is this ?? I've never looked at it this way.

function duplicateEncode(word) {
var letterCount = [];
var letters = word.toLowerCase().split('');
console.log(letters);
letters.forEach(function (letter) {
letterCount[letter] = (letterCount[letter] || 0) + 1;
});

console.log(letterCount);
return letters.map(function (letter) {
return letterCount[letter] === 1 ? '(' : ')';
}).join('');
}

oh very good solution, I like it .