array.filter((v, i) => array.indexOf(v) === i)

function uniqueArrayOfObjects (arrayOfObjects, callback) {

 if (typeof callback !== 'function') callback = compare2Objects

 return arrayOfObjects.filter((item, index) => index == arrayOfObjects.findIndex(x => callback(item, x)))

}

function compare2Objects (a, b) {

 return JSON.stringify(a) === JSON.stringify(b)

}



let data = [

 { name: 'Dat', age: '??' },

 { name: 'Dat', age: 'chua 18~' },

 { name: 'Dai', age: '??' },

 { name: 'Trum', age: '??' },

 { name: 'Ken', age: '??' },

 { name: 'Dai', age: '??' }

]



console.log(uniqueArrayOfObjects(data))



console.log("



với callback

", uniqueArrayOfObjects(data, (a, b) => {

 return a.name == b.name

}))