How to select an object by highest property value

Question

I have an object:

[
   {
      name: "first name",
      rolePosition: 85
   },
   {
      name: "second name",
      rolePosition: 91
   }
]

How to select an object with the highest rolePosition value? In this situation is 91

Do you mean `[{name: "first name",rolePosition: 85},{name: "second name",rolePosition: 91}]`? — ruleboy21, Apr 18 '22 at 08:09
Does this answer your question? [Finding the max value of an attribute in an array of objects](https://stackoverflow.com/questions/4020796/finding-the-max-value-of-an-attribute-in-an-array-of-objects) — vchan, Apr 18 '22 at 08:28

score 4 · Accepted Answer · edited Apr 18 '22 at 08:25

4

The problem can be solved with Array.reduce() as follows:

const arr = [{ name: "first name", rolePosition: 85 }, { name: "second name", rolePosition: 91 }];

const result = arr.reduce((prev, curr) => prev.rolePosition > curr.rolePosition ? prev : curr , {});

console.log(result);

edited Apr 18 '22 at 08:25

ruleboy21

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answered Apr 18 '22 at 08:14

uminder

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score 1 · Answer 2 · edited Apr 18 '22 at 08:18

1

This is your solution.

const arr = [
   {
      name: "first name",
      rolePosition: 85
   },
   {
      name: "second name",
      rolePosition: 91
   }
];
const numbers = [];
arr.forEach(el => numbers.push(el.rolePosition));
const max = Math.max(...numbers);

console.log(max)

edited Apr 18 '22 at 08:18

ruleboy21

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answered Apr 18 '22 at 08:15

Karen Boyakhchyan

54
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3

score 0 · Answer 3 · answered Apr 18 '22 at 08:46

You can use Math.max, Array.prototype.find to create similar function _.maxBy lodash

const maxBy = (arr, func) => {
  const max = Math.max(...arr.map(func))
  return arr.find(item => func(item) === max)
}
maxBy([{ test: 1 }, { test: 2 }], o => o.test)
// { test: 2 }

// or use reduce
const maxItem = arr.reduce(function(a, b) { return a.rolePosition >= b.rolePosition ? a : b }, {})

How to select an object by highest property value

3 Answers3