Remove duplicates from a given array in Javascript

Remove duplicates from a given array in Javascript:
There are a lot of methods to remove duplicate elements from an array.

Solution 1 
I am trying to write a javascript code that takes a for loop and sets a value into a new array

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

var array = [1, 1, 3, 5, 3, 5,4];
console.info((array));
console.info(removeDuplicates(array));

Solution 2
Use the jquery

var array = [1, 1, 3, 5, 3, 5,4];
var uniqueArray=[];
$.each(array, function(i, el){
if($.inArray(el, uniqueArray) === -1) uniqueArray.push(el);
});
console.info((uniqueArray));

Solution 3
Using the set constructor

var array = [1, 1, 3, 5, 3, 5,4];
var uniqueArray = new Set(array);
console.info((uniqueArray));

Also, read Fair of element