const names = ['John', 'Paul', 'George', 'Ringo', 'John'];
let unique = [...new Set(names)];
console.log(unique); // 'John', 'Paul', 'George', 'Ringo'// for TypeScript and JavaScript
const initialArray = ['a', 'a', 'b',]
finalArray = Array.from(new Set(initialArray)); // a, buniqueArray = 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;
})
arr.filter((v,i,a)=>a.findIndex(t=>(t.place === v.place && t.name===v.name))===i)