JAVASCRIPT

js remove json value duplicates

var data = [{
    "name": "Peter",
    "age": 30,
    "hair color": "brown"
}, {
    "name": "Steve",
    "age": 55,
    "hair color": "blonde"
}, {
    "name": "Steve",
    "age": 55,
    "hair color": "blonde"
}]

 data = this.data.filter((obj, pos, arr) => {
   return arr
     .map(mapObj => mapObj.name)
     .indexOf(obj.name) == pos;
 });

console.log(data);
/*
[{
    "name": "Peter",
    "age": 30,
    "hair color": "brown"
}, {
    "name": "Steve",
    "age": 55,
    "hair color": "blonde"
}]
*/

remove duplicate json object from array javascript

const temp =  [{first: 569, second: "789", third: "458"},  {first: 476, second : "147", third: "369"},  {first: 100, second: "200", third: "300"},  {first: 100, second: "200", third: "300"},   {first: 100, second: "200", third: "300"}];

const result = [...new Set(temp.map(obj => JSON.stringify(obj)))]
                 .map(str => JSON.parse(str));
console.log(result);