Function to remove duplicate elements from an array

removeDuplicates.js

function removeDuplicates(values) {
    var uniqueValues = {};
    values.forEach(function(i) {
        if (!uniqueValues[i]) {
            uniqueValues[i] = true;
        }
    });
    return Object.keys(uniqueValues);
}

// var values = ['a','b','a','a','b','c','b'] will return ['a', 'b', 'c']