const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'let arr = [1,2,3,1,1,1,4,5]
let filtered = arr.filter((item,index) => arr.indexOf(item) === index)
console.log(filtered) // [1,2,3,4,5]const names = ["Alvi", "Arham", "Talha", "Safi", "Sameer", "Nazmi", "labli", "Arham", "Talha", "Labiba", "Tabassum", "Adiba"];
function removeDuplication(names) {
const unique = [];
for (element of names) {
if (unique.indexOf(element) == -1) {
unique.push(element)
}
}
return unique;
}
console.log(removeDuplication(names));
//Output:
/* [
'Alvi',
'Arham', 'Talha',
'Safi', 'Sameer',
'Nazmi', 'labli',
'Labiba', 'Tabassum',
'Adiba'
] */const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let x = (names) => names.filter((v,i) => names.indexOf(v) === i)
x(names); // 'John', 'Paul', 'George', 'Ringo'var myArr = [1, 2, 2, 2, 3];
var mySet = new Set(myArr);
myArr = [...mySet];
console.log(myArr);
// 1, 2, 3function remove_duplicates(arr) {
var obj = {};
var ret_arr = [];
for (var i = 0; i < arr.length; i++) {
obj[arr[i]] = true;
}
for (var key in obj) {
ret_arr.push(key);
}
return ret_arr;
}