javascript Function Remove Duplicates from JavaScript Array

function removeDuplicates(arr) {

    var temp = {};

    for (var i = 0; i < arr.length; i++)

        temp[arr[i]] = true;

 

    var r = [];

    for (var k in temp)

        r.push(k);

    return r;

}

 

//Usage

var fruits = ['apple', 'orange', 'peach', 'apple', 'strawberry', 'orange'];

var uniquefruits = removeDuplicates(fruits);

//print uniquefruits ['apple', 'orange', 'peach', 'strawberry'];