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]var array = [1, 2, 3, 4, 4, 5, 5],
result = array.filter(function (v, _, a) {
return a.indexOf(v) === a.lastIndexOf(v);
});
console.log(result); // [1, 2, 3]
uniqueArray = a.filter(function(item, pos) {
return a.indexOf(item) == pos;
})
unique = [...new Set(arr)]; // where arr contains duplicate elementsuniqueArray = a.filter(function(item, pos) {
return a.indexOf(item) == pos;
})