how to remove duplicate array object in javascript

1let person = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"}];
2
3function removeDuplicates(data, key) {
4  
5  return [
6    ...new Map(data.map(item => [key(item), item])).values()
7  ]
8
9};
10
11console.log(removeDuplicates(person, item => item.name));

1const arr = [{id: 1, name: 'one'}, {id: 2, name: 'two'}, {id: 1, name: 'one'}]
2
3const ids = arr.map(o => o.id)
4const filtered = arr.filter(({id}, index) => !ids.includes(id, index + 1))
5
6console.log(filtered)

1let person = [
2{name: "john"}, 
3{name: "jane"}, 
4{name: "imelda"}, 
5{name: "john"},
6{name: "jane"}
7];
8
9const data = Array.from(new Set(person.map(JSON.stringify))).map(JSON.parse);
10console.log(data);

1let person = [
2{name: "john"}, 
3{name: "jane"}, 
4{name: "imelda"}, 
5{name: "john"},
6{name: "jane"}
7];
8
9const obj = [...new Map(person.map(item => [JSON.stringify(item), item])).values()];
10console.log(obj);

1let days = ["senin","senin","selasa","selasa","rabu","kamis", "rabu"];
2let fullname = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"},{name: "jane"}];
3
4// REMOVE DUPLICATE FOR ARRAY LITERAL
5const arrOne = new Set(days);
6console.log(arrOne);
7
8const arrTwo = days.filter((item, index) => days.indexOf(item) == index);
9console.log(arrTwo);
10
11
12// REMOVE DUPLICATE FOR ARRAY OBJECT
13const arrObjOne = [...new Map(person.map(item => [JSON.stringify(item), item])).values()];
14console.log(arrObjOne);
15
16const arrObjTwo = Array.from(new Set(person.map(JSON.stringify))).map(JSON.parse);
17console.log(arrObjTwo);

1var arrayWithDuplicates = [
2    {"type":"LICENSE", "licenseNum": "12345", state:"NV"},
3    {"type":"LICENSE", "licenseNum": "A7846", state:"CA"},
4    {"type":"LICENSE", "licenseNum": "12345", state:"OR"},
5    {"type":"LICENSE", "licenseNum": "10849", state:"CA"},
6    {"type":"LICENSE", "licenseNum": "B7037", state:"WA"},
7    {"type":"LICENSE", "licenseNum": "12345", state:"NM"}
8];
9
10function removeDuplicates(originalArray, prop) {
11     var newArray = [];
12     var lookupObject  = {};
13
14     for(var i in originalArray) {
15        lookupObject[originalArray[i][prop]] = originalArray[i];
16     }
17
18     for(i in lookupObject) {
19         newArray.push(lookupObject[i]);
20     }
21      return newArray;
22 }
23
24var uniqueArray = removeDuplicates(arrayWithDuplicates, "licenseNum");
25console.log("uniqueArray is: " + JSON.stringify(uniqueArray));