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javascript object get value by key in array

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Real Rabbit answered on November 9, 2020 Popularity 10/10 Helpfulness 3/10

answer javascript object get value by key in array

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javascript object get value by key in array

Comment

function search(nameKey, myArray){
    for (var i=0; i < myArray.length; i++) {
        if (myArray[i].name === nameKey) {
            return myArray[i];
        }
    }
}

var array = [
    { name:"string 1", value:"this", other: "that" },
    { name:"string 2", value:"this", other: "that" }
];

var resultObject = search("string 1", array);

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: stackoverflow.com

Tags: get javascript key object

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Contributed on Sep 15 2021

Real Rabbit

0 Answers Avg Quality 2/10

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js find key by value in object

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Object.keys(object).find(key => object[key] === value)

Popularity 10/10 Helpfulness 8/10 Language javascript

Source: Grepper

Tags: find

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Contributed on Dec 30 2020

Super Stoat

0 Answers Avg Quality 2/10

javascript object get value by key

Comment

const person = {
  name: 'Bob',
  age: 47
}

Object.keys(person).forEach((key) => {
  console.log(person[key]); // 'Bob', 47
});

Popularity 10/10 Helpfulness 5/10 Language javascript

Source: Grepper

Tags: get

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Contributed on Dec 05 2020

peachmangopie

0 Answers Avg Quality 2/10

How to get a key in a JavaScript object by its value

Comment

function getKeyByValue(object, value) {
  return Object.keys(object).find(key => object[key] === value);
}


const map = {"first" : "1", "second" : "2"};
console.log(getKeyByValue(map,"2"));
 Run code snippet

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: stackoverflow.com

Tags: get

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Contributed on Jan 08 2023

Mystic Dev

0 Answers Avg Quality 2/10

best way to find object in array by key value

Comment

While there are many correct answers here, many of them do not address the fact that this is an unnecessarily expensive operation if done more than once. In an extreme case this could be the cause of real performance problems.

In the real world, if you are processing a lot of items and performance is a concern it's much faster to initially build a lookup:

var items = [{'id':'73','foo':'bar'},{'id':'45','foo':'bar'}];

var lookup = items.reduce((o,i)=>o[i.id]=o,{});
you can then get at items in fixed time like this :

var bar = o[id];
You might also consider using a Map instead of an object as the lookup:

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: find

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Contributed on Mar 29 2023

DOS.NET

0 Answers Avg Quality 2/10

javascript object get value by key

Comment

var obj = {
   a: "A",
   b: "B",
   c: "C"
}

console.log(obj.a);  // return string : A

var name = "a";
console.log(obj[name]);

Popularity 10/10 Helpfulness 3/10 Language javascript

Source: Grepper

Tags: get

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Contributed on Nov 09 2020

Lokesh003

0 Answers Avg Quality 2/10

javascript object get value by key in array

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