Answers for "javascript remove duplicates objects from array"

Javascript

remove duplicates in array object javascript

//check one attribute
let person = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"}];

person = person.filter((item, index, self) =>
  index === self.findIndex((t) => (
    t.name === item.name
  ))
)

//check two attributes
let person = [{place: "uno", name: "john"}, {place: "duno", name: "jane"}, {place: "duno" ,name: "imelda"}, {place: "uno" ,name: "john"}];

person = person.filter((item, index, self) =>
  index === self.findIndex((t) => (
    t.place === item.place && t.name === item.name
  ))
)

Posted by: Guest on September-08-2021

remove duplicate objects from array javascript

const addresses = [...]; // Some array I got from async call

const uniqueAddresses = Array.from(new Set(addresses.map(a => a.id)))
 .map(id => {
   return addresses.find(a => a.id === id)
 })

Posted by: Guest on January-02-2020

-1

remove duplicates from array of objects javascript

let arr = [{name: "john"}, {name: "jane"}, {name: "imelda"}, {name: "john"}];

const uniqueArray = arr.filter((v,i,a)=>a.findIndex(t=>(t.name===v.name))===i)
console.log(uniqueArray);

Posted by: Guest on June-21-2021

Removing duplicates in an Array of Objects

// BEST ANSWER - LINEAR TIME SOLUTION

const seen = new Set();
const arr = [
  { id: 1, name: "test1" },
  { id: 2, name: "test2" },
  { id: 2, name: "test3" },
  { id: 3, name: "test4" },
  { id: 4, name: "test5" },
  { id: 5, name: "test6" },
  { id: 5, name: "test7" },
  { id: 6, name: "test8" }
];

const filteredArr = arr.filter(el => {
  const duplicate = seen.has(el.id);
  seen.add(el.id);
  return !duplicate;
});

Posted by: Guest on September-10-2020

Source

remove duplicates from array of objects javascript

arr.filter((v,i,a)=>a.findIndex(t=>(t.place === v.place && t.name===v.name))===i)

Posted by: Guest on September-10-2020

Source

-1

remove duplicates objects from array javascript

function remove_duplicate_objects(data,prop) {
    var seen = {};
    data = data.filter(function (entry) {
      if (seen.hasOwnProperty(entry[prop])) {
        return false;
      }

      seen[entry.prop] = entry;
      return true;
    });
    return data
  }

const new_array = remove_duplicate_objects([array with objects inside])

Posted by: Guest on February-23-2021

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