best way to find object in array by key value

DOS.NET answered on September 15, 2021 Popularity 9/10 Helpfulness 4/10

answer best way to find object in array by key value

related javascript object get value by key in array

best way to find object in array by key value

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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 javascript key-value object

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Contributed on Mar 29 2023

DOS.NET

0 Answers Avg Quality 2/10

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javascript object get value by key in array

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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

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Contributed on Sep 15 2021

Real Rabbit

0 Answers Avg Quality 2/10

best way to find object in array by key value

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best way to find object in array by key value

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javascript object get value by key in array

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