const removeDuplicates = (arr) => [...new Set(arr)];

​

console.log(removeDuplicates([1, 2, 3, 3, 4, 4, 5, 5, 6]));

// Result: [ 1, 2, 3, 4, 5, 6 ]

let chars = ['A', 'B', 'A', 'C', 'B'];

let uniqueChars = [...new Set(chars)];

​

console.log(uniqueChars);

​

output:

[ 'A', 'B', 'C' ]

const myArray = [2,5,6,2,2,4,5,3,3];

​

const uniqueArray = [...new Set(myArray)];

​

console.log(uniqueArray);

// removeDuplicates ES6

const uniqueArray = oldArray.filter((item, index, self) => self.indexOf(item) === index);

​

let chars = ['A', 'B', 'A', 'C', 'B'];

let uniqueChars = [...new Set(chars)];

​

console.log(uniqueChars);

​

// Use to remove duplicate elements from the array

​

const numbers = [2,3,4,4,2,3,3,4,4,5,5,6,6,7,5,32,3,4,5]

​

console.log([...new Set(numbers)])

​

// [2, 3, 4, 5, 6, 7, 32]

let myArray = ['a', 'b', 'a', 'b', 'c', 'e', 'e', 'c', 'd', 'd', 'd', 'd']

let myOrderedArray = myArray.reduce(function (accumulator, currentValue) {

  if (accumulator.indexOf(currentValue) === -1) {

    accumulator.push(currentValue)

  }

  return accumulator

}, [])

​

console.log(myOrderedArray)

uniq = [...new Set(array)];

​

or 

​

uniqueArray = a.filter(function(item, pos) {

    return a.indexOf(item) == pos;

})

​

let Arr = [1,2,2,2,3,4,4,5,6,6];

​

//way1

let unique = [...new Set(Arr)];

console.log(unique);

​

//way2

function removeDuplicate (arr){

    return arr.filter((item,index)=> arr.indexOf(item) === index);

}

​

removeDuplicate(Arr);

​

​

const uniqueValue = [...new Set([...arr])];

console.log(uniqueValue);

Output:

[1, 3, 4, 2]

const removeDuplicates = (arr) => [...new Set(arr)]

​

removeDuplicates([31, 56, 12, 31, 45, 12, 31])

//[ 31, 56, 12, 45 ]