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javascript unique array of objects by property

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Jeff Le answered on November 15, 2020 Popularity 8/10 Helpfulness 7/10

answer javascript unique array of objects by property

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javascript unique array of objects by property

Comment

const array =
  [
    { "name": "Joe", "age": 17 },
    { "name": "Bob", "age": 17 },
    { "name": "Carl", "age": 35 }
  ]

function uniqueByKey(array, key) {
  return [...new Map(array.map((x) => [x[key], x])).values()];
}

console.log(uniqueByKey(array, 'age'));

Popularity 8/10 Helpfulness 7/10 Language javascript

Source: Grepper

Tags: javascript unique

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Contributed on Nov 15 2020

Jeff Le

0 Answers Avg Quality 2/10

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unique values from array of objects

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const array =
  [
    { "name": "Joe", "age": 17 },
    { "name": "Bob", "age": 17 },
    { "name": "Carl", "age": 35 }
  ]

const key = 'age';

const arrayUniqueByKey = [...new Map(array.map(item =>
  [item[key], item])).values()];

console.log(arrayUniqueByKey);

   /*OUTPUT
       [
        { "name": "Bob", "age": 17 },
        { "name": "Carl", "age": 35 }
       ]
   */

 // Note: this will pick the last duplicated item in the list.
 Run code snippet

Popularity 10/10 Helpfulness 10/10 Language javascript

Source: stackoverflow.com

Tags: javascript j

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Contributed on May 29 2022

Lively Lark

0 Answers Avg Quality 2/10

js array unique object

Comment

const array = [
    { id: 3, name: 'Central Microscopy', fiscalYear: 2018 },
    { id: 5, name: 'Crystallography Facility', fiscalYear: 2018 },
    { id: 3, name: 'Central Microscopy', fiscalYear: 2017 },
    { id: 5, name: 'Crystallography Facility', fiscalYear: 2017 }
  ];
const result = [];
const map = new Map();
for (const item of array) {
    if(!map.has(item.id)){
        map.set(item.id, true);    // set any value to Map
        result.push({
            id: item.id,
            name: item.name
        });
    }
}
console.log(result)

Popularity 10/10 Helpfulness 4/10 Language javascript

Source: codeburst.io

Tags: array-unique array-uniq

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Contributed on Nov 21 2022

Bloody Batfish

0 Answers Avg Quality 2/10

find unique objects in an array of objects in javascript 5

Comment

var array = [{"name":"Joe", "age":17}, {"name":"Bob", "age":17}, {"name":"Carl", "age": 35}];
var unique = [];
var distinct = [];
for(var i = 0; i < array.length; i++ ){
  if(!unique[array[i].age]){
    distinct.push(array[i]);
    unique[array[i].age] = 1;
  }
}


gs.info(distinct);

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.com

Tags: find

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Contributed on Oct 27 2021

Wild Weasel

0 Answers Avg Quality 2/10

javascript find unique values in array of objects

Comment

var flags = [], output = [], l = array.length, i;
for( i=0; i<l; i++) {
    if( flags[array[i].age]) continue;
    flags[array[i].age] = true;
    output.push(array[i].age);
}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: stackoverflow.com

Tags: find

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Contributed on Jan 07 2021

Worrisome Wallaby

0 Answers Avg Quality 2/10

javascript unique array of objects by property

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