Javascript merge array of objects to single object. Pass the array to the Map() constructor.

Javascript merge array of objects to single object To solve the problem, in the example below we use the following methods: forEach() - to iterate over all objects inside array, filter() - to check if an object with a given type property value already exists, concat() - if an object with a given type already exists, the current object Nov 12, 2024 · One standout feature of Lodash is the _. Using Object. Jun 8, 2022 · To turn it into a single object you must remove the }, { between the objects and replace them with a comma. Use the Object. It will return the target object. I want to update (replace) the objects in my array with the objects in another array. Merge these arrays while noting that objects remain independent in memory, maintaining their distinct references. Feb 22, 2011 · What is the most efficient way to concatenate N arrays of objects in JavaScript? The arrays are mutable, and the result can be stored in one of the input arrays. _. assign is for objects, what your after is merging array's. This tutorial major purpose is to provide an efficient use of array objects. Is there a simple way to use the spread operator to combine an array of objects with a another object to create a single object? This example shows what I'm trying to accomplish: Aug 9, 2023 · In this article, we’ve explored how to merge two JSON objects into one in JavaScript/Node. 229 ECMAscript 6 introduced Object. [ { "11": "1100" }, { "22": "2200" } ]), see How to convert array of key–value objects to array of objects with a single property?. Nov 13, 2023 · Master JavaScript arrays with ease! Discover the top 3 efficient methods to merge objects—boost code performance and simplicity. entries () method. Lodash has a merge method that works on objects (objects with the same key are merged). js Strings Streams Date & Time Arrays Promises JSON Iterators Classes Apr 5, 2017 · 1 You could use a dynamic approach by combining all arrays to one object and use the key names as property names for the result objects in the array Nov 7, 2014 · How is an array of objects "a pain to use in javascript"? Granted the objects are normally all the same structure, but we use arrays of objects all the time, quite painlessly. Spread Operator Jan 5, 2022 · You can use a function to combine multiple arrays, assigning each value to a key at its index. Mar 12, 2019 · I have a object where data is an array of objects, inside data object I have one users property which is an array. Jul 21, 2016 · 5 Here's some steps using lodash: Put all objects into an array (_. Therefore, for the above array, the output should look like − Mar 13, 2023 · One of the key features of JavaScript is its ability to work with objects, which are a fundamental data type used to store and manipulate information. values adds an extra level of array. f Description The concat() method concatenates (joins) two or more arrays. Dec 18, 2019 · Group the objects into an aggregate object by some key which we can make a parameter to a function mergeByKey. * For objects with the same key, properties from the objects in the second array (`arrayB`) overwrite those in the first (`arrayA`). I've tried that, however it still returns multiple arrays instead of a single array with the combined objects inside. Using concat () with Complex Structures Merging Arrays of Objects Define arrays containing object literals. This method allows us to merge multiple objects into a single object. Nov 23, 2020 · Our function should then prepare an object of properties, one property for each object id the objects currently have. Use Array#flatMap to select the features array from each of the entries above and project their contents into a May 17, 2013 · If I have an array of strings, I can use the . values () method extracts the property values of an object and returns them as an array, converting the original object into an array of objects. But, it does not remove duplicates. In this article, we would like to show you how to merge objects in an array with the same keys in JavaScript. entries(obj)) and exclude the ones that Jul 18, 2018 · You could make a function that gets an array of objects as a parameter. How do I merge two arrays in JavaScript so that I get only the unique items from each array in the same order they were inserted into the original arrays? In this tutorial, you will learn how to merge objects and create a new object that combines the properties of all the objects. Oct 27, 2017 · Object. To Merge or flatten array we can use array. May 19, 2025 · By using JavaScript to merge arrays of user information and remove duplicates, they maintain an efficient and clean database for better user experiences and targeted advertising. Below are different approaches to merging objects in an array by a Feb 15, 2024 · 3. merge function from lodash to merge objects from the second array into the first array based on their index positions. e. assign() method, and JSON stringify and parse methods. Mar 25, 2018 · This solution uses reduce and forEach to combine all objects in sub-arrays into a Map, with part_d as key, and the qty the result of the combined quantities. For example I'd like to: Jul 23, 2025 · Merging an array of objects by property using Lodash is a common operation when you need to consolidate data that share a common identifier. Iterate over each object's (basket's) key-value pairs using Object. e. This method copies the values of all enumerable properties from source objects (one or more) to a target object. In this demo, the arrays a and b are first converted into objects (where userId is the key), then merged, and the result converted back to an array (_. This process is commonly known as object merging and can be achieved using Sep 29, 2023 · If you need call to two (or more) diferents APIs and one is not depending another, you use forkJoin rxjs operator to have an unique subscription. keys method and checking which object from arr2 has maximum matching object with the item of arr1. This will tackle the merging of JSON object into one array object. Dec 5, 2022 · A more flexible approach would construct the output object by first mapping one of the input objects, with empty arrays as values - then for each input object, iterate over each subarray and push to the key in the output object. In an object literal, the spread syntax enumerates the properties of an object and adds the key-value pairs to the object being created. Nonetheless, we will do the merging operation over the parsed objects, on their JavaScript representation. Want to improve this question? Guide the asker to update the question so it focuses on a single, specific problem. If edited, the question will be reviewed and might be reopened. entries(obj)) and exclude the ones that Oct 29, 2021 · Since you only want to update the existing object, using forEach to loop over each item in array, then loop over the prosperity with a map operator to get the array with itemName. assign() to achieve this natively in Javascript. assign () Feb 13, 2012 · Instead of looping over the entire table, you can also use the columns array to generate a Row class (using defineProperty) and then use that row class to wrap the row arrays in your rows array. The concat() method does not change the existing arrays. merge plays a crucial role in combining data structures. assign() method and the spread operator provide effective ways to accomplish this task seamlessly. Using map (Most Popular Approach) The map method is widely used because it is simple, concise, and works efficiently for arrays of the same length. In this post, you'll find 3 ways to merge arrays Jun 23, 2017 · What is the most efficient way to merge two objects? I made a function which iterates through each key in the objects, it works but I think it's not the write way. 164 A flurry of answers just came in and here is one more! The first option is using the native js join method which eliminates the need for reduce. Mar 20, 2024 · Learn how to combine two or more objects into a single object in JavaScript. 1. The Role of Lodash Merge At its core, _. I went through the question How can I merge properties of two JavaScript objects dynamically? Nov 21, 2020 · Learn how to merge two arrays containing objects into a single array in JavaScript with this comprehensive guide. Sep 9, 2023 · A syntax that allows you to expand an iterable object, such as an array or a string, into its individual elements. Feb 4, 2023 · Learn how to merge objects in JavaScript with different methods and examples. Feb 9, 2022 · @Shatsuki That question is about merging arrays of strings, this question is about merging an array of objects, where some of the objects themselves might need to be merged. Using JavaScript Object. assign)? And while we're at it, what about ES6 Sets (like Array. @dippas OP wants to merge objects based on ID, not just merge arrays. Aug 14, 2015 · Is there a simple way to merge ES6 Maps together (like Object. This will work not just for those two arrays, or only two arrays, but any number of arrays: Sep 7, 2018 · 0 I am trying to combine an array of object into one object that merges the values of all of the like properties. mergeWith() with array spread to combine all items in the array to a single object. Jul 23, 2025 · Given two arrays, the task is to merge both arrays and remove duplicate items from merged array in JavaScript. flatten is then necessary because _. Node. assign () method The first approach is using the Object. merge and apply to pass in array as arg) Sep 14, 2020 · Let’s say the following are our two arrays − var firstArray = ['John', 'David', 'Bob']; var secondArray = ['Mike','Sam','Carol']; To combine two arrays into an Learn how to merge two arrays of objects in TypeScript in 3 easy steps. You should test merging Arrays with the largest number of elements you expect to avoid unintended consequences though. Jul 23, 2025 · To merge values from a child object into a parent object based on a specific key name in JavaScript, you can utilize the Object. For the reduce folks it's fun to feel cool writing tiny code but for example if the array had 1000 one element Mar 24, 2023 · 0 One method is to use Array#map to create the array with updated counts and Array#find to get the matching element by id from the second array (if any) on each iteration. Oct 13, 2024 · Instead, it makes use of built-in array functions like concat and filter. Kindly Mar 3, 2024 · Learn how to create and manipulate arrays of objects in JavaScript. Apr 19, 2022 · I try to merge an array of objects into a single string, but got a bit lost. values() iterator: 51 This question already has answers here: How to merge multiple array of object by ID in javascript? (5 answers) Mar 3, 2021 · JavaScript Objects First, a JavaScript object is a collection of key-value pairs. I went through the question How can I merge properties of two JavaScript objects dynamically? I have a javascript object with several keys whose values are arrays of objects. concat (objArrs) for better browser compatibility) then reduce d into a single object. Jan 13, 2025 · In JavaScript, objects are a fundamental data type used to store collections of key-value pairs. com Aug 6, 2023 · Learn different approaches to merge an array of objects in JavaScript. This method does not change the existing arrays, but instead returns a new array. Nov 7, 2019 · Which is an example of a merge in JavaScript? An array is a data structure representing an ordered collection of indexed items. Nov 9, 2013 · If you’re looking for a variant where the result is another array of individual objects with a single property (e. Its proposal as been enabled by default in tools like Babel long before that. keys. For example, having two arrays [1, 2] and [5, 6], then merging these arrays results in [1, 2, 5, 6]. A useful guide for web developers with code examples. Jul 20, 2025 · The spread () syntax allows an iterable, such as an array or string, to be expanded in places where zero or more arguments (for function calls) or elements (for array literals) are expected. This operation involves combining the elements of two arrays while ensuring that each resulting object has a unique identifier. I have read some blogs which are using Map, Nov 28, 2024 · Here, three arrays fruits, vegetables, and grains are merged into a single large array combinedFood. array. Jun 6, 2022 · Introduction At work recently, I encountered an interesting problem: I needed to merge multiple JavaScript objects together in an array based on their matching keys. Nov 24, 2022 · I need to merge these arrays, such any two objects with the same id are merged - keeping the same ID, keeping the balance from remote and combining their ref values, so the ideal output of this example would be: Apr 21, 2020 · 0 You can use Lodash's _. reduce might be a good start. prototype. Nov 23, 2020 · We are required to write a function that groups this data, present in both arrays according to unique persons, i. Once a match is found, the objects are merged into a single object. In many cases, developers need to merge two or more objects together in order to create a single object that combines the properties and values of each individual object. I get an error like below . Any ideas? Convert the lists to objects keyed by label, merge them by _. Return an object containing the current key-value pair on each iteration. This function takes any number of object arrays which are then flattened (change flat to []. Merges an array of objects into a single object containing all the key/value pairs from each of the objects in the input array. assign () This is a three-step process: Use the Array. ) or other objects. assign () method makes a copy of a new object after copying all properties from source objects and then return that object. Apr 26, 2017 · I want to convert an array of objects to object with key value pairs in javascript. What is the shortest way to do this, and is this possible without writing a for loop? Jan 11, 2019 · Objects can't be sorted, you will have to convert it again to an array before sorting. If objects with the same index exist in both arrays, properties from the second object overwrite properties in the first object. I need to get all the users into a single array. after use map operator to return the join of the two response. For example, if you have a list of user objects and you want to combine them into a single object based on a unique property, Lodash provides useful functions to simplify this process. Apr 2, 2020 · Merging objects in JavaScript is a common task. org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/join Jul 21, 2020 · Output The above code will produce the following output − On clicking the ‘CLICK HERE’ button − Oct 11, 2018 · Note both approaches utilize ES6 arrow functions, array destricturing and (for the 2nd one) combining multiple operations via enclosing them in parentheses (op1,op2) Sep 6, 2020 · Introduction In this tutorial we will learn how to merge two JSON objects using JavaScript. The method streamlines the merging of multiple collections efficiently. assign is a method for copying the values of all enumerable properties from one or more source objects to a target object, providing a simple way for shallow merging. This tutorial shows you how to merge objects in JavaScript. Jul 18, 2018 · You could make a function that gets an array of objects as a parameter. flatten then _. It helps in creating shallow copies of arrays or objects, combining multiple arrays or objects, and adding new elements or properties. . But to use the replace (…) expression you’ll need a string, not an array. Understanding how to js merge objects effectively is crucial for maintaining clean and efficient code. For instance, we can write: Jun 22, 2020 · Combine array of objects into a single object [duplicate] Asked 5 years, 5 months ago Modified 5 years, 4 months ago Viewed 3k times For arrays the spread operator was already part of ES6 (ES2015), but for objects it was added to the language spec at ES9 (ES2018). The resulting array of Row objects is then tied to the original rows array, such that changes in one are reflected in the other. If any of the input objects contain the same key, then the returned object will contain the value of the last one in the array. forEach () method calls the provided function once for Nov 11, 2025 · Learn how to merge objects in JavaScript using the spread operator, Object. Often, developers find themselves in situations where they need to combine the properties of two or more objects into a single object. Nov 20, 2018 · Given the object below, I'm looking for a clean and efficient way to create an array from each item's "subItems" array. These are the following approaches: Dec 18, 2014 · Merge multiple objects inside the same array into one object [duplicate] Asked 10 years, 11 months ago Modified 4 years, 7 months ago Viewed 135k times Jan 4, 2023 · Yesterday, we looked at how to create a unique copy of an array or object. The input looks like that: Oct 18, 2009 · var array3 = ["Vijendra","Singh","Shakya"]; The output array should have repeated words removed. It allows the privilege to obtain a list of parameters from an array. I will provide a sample program to show the actual coding of this tutorial. assign() to combine these objects. So how would you go about doing that? Nov 24, 2020 · Learn how to convert an array of objects to a single object with all key-value pairs in JavaScript. map() method to iterate over the array of keys. MDN documentation on Object. A common operation performed on multiple arrays is merge — when 2 or more arrays are merged to form a bigger array containing all the items of the merged arrays. So from Jul 11, 2025 · Here are some common methods which can be used to convert an array to an object: 1. forEach () method. Jul 12, 2025 · Using Object. Seems like you need to copy all the values of one array to a new one, then merge the second (and subsequent) arrays into it. The concat() method returns a new array, containing the joined arrays. The basic method to merge two arrays without duplicate items is using spread operator and the set constructor. Aug 31, 2021 · In this post we will cover everything about how to merge two objects in JavaScript including, deep, and shallow merges, as well as same keys and preventing overwriting keys. extend, which is the proper jQuery way to "merge" JSON objects. Note: Both arrays should be the same length to get a correct answer. Narrowing the question will help others answer the question concisely. Jun 19, 2023 · Using plain JavaScript or lodash, what's the easiest way to transform an array of objects into a single object, while concatenating any array values? I can achieve it on a single property using _. assign Object. Jan 24, 2017 · * Merges two arrays of objects (`arrayA` and `arrayB`) into one, resolving conflicts based on a key returned by the `callbackFn`. Using Spread Operator The Spread operator allows an iterable to expand in places where 0+ arguments are expected. May 9, 2021 · We can use the JavaScript array reduce method to combine objects in an array into one object. Each object has the same structure. Values themselves can be JavaScript primitives (string/text, number, boolean, etc. And de-duplication in those answers won't work on objects anyway. assign () method. This step-by-step guide will show you how to use the `concat ()`, `spread ()`, and `reduce ()` methods to combine two arrays of objects into one. An array is a data structure representing an ordered collection of indexed items. Apr 30, 2012 · Upon first appearance, the word "merg" leads one to think you need to use . ,concat () can be used to merge multiple arrays together. https://developer. assign, and convert it back to an array. Mar 30, 2023 · Learn how to merge any object in JavaScript with the spread ( ) operator, Object. For example, arrays with related data coming from different sources can be merged into one single array. Aug 5, 2025 · Merging two arrays of objects with unique values is a common task in JavaScript. js Series Overview Node. A working Jul 24, 2023 · Now we need to merge the two array of objects into a single array by using id property because id is the same in both array objects. join() method to get a single string, with each element separated by commas, like so: All of the solutions that use reduce + concat are O ( (N^2)/2) where as a accepted answer (just one call to concat) would be at most O (N*2) on a bad browser and O (N) on a good one. merge function, which enables developers to combine objects and arrays in a seamless manner. How I have an array of objects which needs to be combined into single object but while merging it has a preference over certain values. However, $. Nov 21, 2020 · Learn how to merge two arrays containing objects into a single array in JavaScript with this comprehensive guide. assign () method is used to copy the values of all enumerable own properties from one or more source objects to a target object. Array. We will assume that we are starting from two JSON strings and, at the end, we want to obtain a single JSON string with the merged objects. g. js while retaining all information. Aug 24, 2016 · what if I have 20 or more arrays? I can't find a way to dynamically pass the arrays as arguments in a loop. Jun 30, 2015 · Given input: [{ a: 1 }, { b: 2 }, { c: 3 }] How to return: { a: 1, b: 2, c: 3 } For arrays it's not a problem with lodash but here we have array of objects. values () method Object. map then _. Then we merge the two item together. Mar 27, 2023 · In many cases, you may need to completely transform an array of objects into another array of completely different objects. I am kind of new to javascript/Typescript. Mar 3, 2024 · # Table of Contents Merge Map objects in JavaScript Merge Maps in TypeScript # How to merge Map Objects in JavaScript To merge Map objects: Use the spread syntax () to unpack the values of two or more Map objects into an array. For example, when starting an application you may load multiple configuration files and merge them into a single configuration object. Javascript objects are key-value paired Oct 13, 2022 · Introduction In this tutorial we will create a How to Merge Two JSON into One Array Object. groupby) Flatten 2d array into 1d array of 'user' obj (_. If speed is critical, you may consider using JavaScript’s spread syntax and the Array object’s push method for smaller Arrays. Aug 21, 2016 · I've got an array of objects with a few properties, such as 'value' and 'label'. Understand variables, objects, arrays, loops, and functions. Nov 22, 2015 · 72 What is the best way to merge array contents from JavaScript objects sharing a key in common? How can array in the example below be reorganized into output? Here, all value keys (whether an array or not) are merged into all objects sharing the same name key. Nov 28, 2022 · When working with arrays in JavaScript, there are cases where you want to combine multiple arrays together. Nov 4, 2025 · Typically, this involves aligning objects by a shared property (like id, email, or name) and combining their properties into a single object. Jan 26, 2021 · Thanks @evolutionxbox. flat () method. Jun 1, 2021 · now I would like to merge them into one array where my new objects contain one of each of the other arrays like so: Jul 23, 2025 · Merging or flattening an array of arrays in JavaScript involves combining multiple nested arrays into a single-level array. This allows dynamic construction of objects from array data. Explore finding, filtering, transforming, and sorting objects in arrays. We will explore various approaches to merging two arrays of objects with unique values. Object. Nov 8, 2024 · JavaScript often requires manipulating arrays and objects, whether for data handling in back-end applications or managing state in front-end interfaces. You can use the spread operator to merge two or more objects in JavaScript by creating a new object that contains all the properties from the source objects. assign() method to merge the objects. , one object depicting the question and choices for each unique person. I need to be able to merge two (very simple) JavaScript objects at runtime. assign() method. Check if the result object has a property with the name of the key. See full list on gomakethings. Mar 26, 2024 · Combine 2 JavaScript object arrays based on a key Have you ever needed to combine two arrays of objects? Maybe each one contains partial information about the same objects, and you want to merge them into a single array. assign () method: Using this method, we can merge two or more objects into one object. When a new part_id is found, a new object is created by spreading the part into a new object, and overriding qty with 0. There you pass all your objects, map them, then iterate through their key,values with for (const [key, value] of Object. If the same property exists in two object, the values will be collected to an array: Method 2: Using the Object. Loop through an array of objects using Array. It will even retain order of the items on most browsers. We face this need when we have data coming from different streams, and we want to merge them into one data structure. Feb 8, 2018 · I have a requirement to compare the two object arrays and remove duplicate and merge them into a single one. mozilla. concat() method to merge two or more arrays together. Create the output object and specify its type. It allows developers to merge multiple objects and arrays into a single structure, effectively creating a unified Jul 23, 2025 · In this approach, we use the _. While there are many ways to approach this, this blog focuses on merging arrays without using Object. Mar 22, 2022 · Are you looking for something like this? You'll need to add types, but you can merge the features arrays from all entries in the data array using vanilla JS methods. You have two arrays of objects. You may edit the question if you feel you can improve it yourself. It is mostly used in the variable array where there is more than 1 value is expected. What is the most efficient way to groupby objects in an array? For example, given this array of objects: Feb 17, 2022 · The safest approach is to use the concat method of an Array object to merge two Arrays. Oct 15, 2021 · You may need to merge one or more arrays to combine all the elements from the individual arrays into one array. assign({},a,b) also returns the same (first result, which I don't want). extend(true, {}, json1, json2); will cause all values sharing the same key name to be overridden by the latest supplied in the params. In this tutorial, you will learn about the tools JavaScript provides to merge, copy, convert, and filter arrays. Pass the array to the Map() constructor. assign () method Another approach to converting an array of objects into a single object is by utilizing the Object. Today, we’re going to talk about how to merge multiple arrays or objects together. Dec 17, 2024 · Spread Operator for Objects and Arrays in JavaScript The spread operator () is a powerful feature introduced in ES6 (ECMAScript 2015) that allows you to expand or copy elements of arrays or properties of objects into new arrays or objects. This way, no matter how many objects you have, you will get the result of them merged together excluding the undefined and null values. You can create an object keyed by ID and push elements with the same ID to them, then convert back to an array. values) (getting rid of the keys). Let’s dig in! Merging arrays You can use the Array. concat)? Jul 23, 2025 · Here are the different methods to convert an object into an array of objects in JavaScript 1. Closed 7 years ago. Feb 23, 2021 · For each item of arr1 we are finding the keys using Object. Each element in the first array becomes a property name in the object, and the corresponding element in the second array becomes its value. Like a general rule, your data structure should be optimized for the type of operations you are using more often on it. In this article, we would like to show you how to merge multiple objects inside the same array into one object in JavaScript. What is the primary key, id? May 14, 2020 · May 14, 2020 / #arrays JavaScript Array of Objects Tutorial – How to Create, Update, and Loop Through Objects Using JS Array Methods By Ondrej Polesny On average I work with JSON data 18 times a week. Call the concat() method on the first array, and pass each array to merge with it in as arguments. assign(), and the Lodash library. [Approach -1 ] Using for-each loop The arr. assign () Merging via spread operator But if you want to deep merge, you should iterate through all items of an object and merge them one by one (Merging Recursively) or use some great library like Lodash Sample of Deep Merging with Lodash How to Deep Merge JavaScript Objects? Mar 2, 2020 · Result object, empty. ,For merging two arrays using concat () & filter () the time complexity would be as follows:,The ES6 offers a single-line solution for merging arrays without duplicates. This method is easy to implement, making it ideal for small datasets. Just send them as an array. # Create an Object from Two Arrays using Object. Jul 10, 2025 · The concat() method of Array instances is used to merge two or more arrays. It sounds relatively straightforward at first, but there's more to the story that prevented me using the spread operator or Object. You can also use sort method of the array to be sure the response get the array sorted: Oct 14, 2025 · In JavaScript, an object can be created by combining two arrays: one for keys and one for values. Aug 24, 2022 · For shallow merge, javascript has these ways. It returns a new array. Use Array#filter to select the entries in data with the matching type. Explore methods like concat (), spread operator, and reduce () to combine multiple objects into a single object or create a new array with merged properties. Also Denys solution is optimized for the actual question and upto 2x faster than the single concat. Jul 11, 2025 · Here are two different ways to merge properties of two objects in JavaScript. And I still need to google for specific ways to manipulate them almost every time. This method copies the values of all enumerable own properties from one or more source objects to a target object and returns the target object. This is more efficient than looping through on every iteration for larger arrays: Mar 4, 2024 · The function takes 2 arrays as parameters and creates an object from the two arrays. Or even simply, just adding to array. Jan 14, 2015 · If npm libraries can be used as a solution, object-merge-advanced from yours truly allows to merge objects deeply and customise/override every single merge action using a familiar callback function. Appending objects to an array is a fundamental operation that comes in handy, especially when dealing with dynamically generated data such as responses from API calls or user-generated content. The Object. Jan 24, 2025 · Here are the different methods to create an array of objects from multiple arrays in JavaScript: 1. Object merging is used while working with APIs. The new Map will contain the key-value pairs from all provided Map objects. Aug 23, 2024 · In this approach, we manually loop through one array and use the "find" method to search for a matching object in the other array based on a common ID. We have to write a function that converts this array into an array where all the headings (h1, h2, h3 …) that have the same id get clubbed inside the same object. Depending on your use case, this could be useful or a problem. This process involves iterating through each nested array and appending its elements to a new array, resulting in a flattened structure. join(' ') of course gives me " [object] [object]", but instead I need to get a string of the 'value' properties of all objects, separated by a space. I am trying to combine all key/values into a single array of objects. The Map is then converted back to an array by spreading the Map. oyyiaap izwq qvpc prnn ycft craoj umuw fgkcgk sgyg jyw tjdp jlslhkj enny huzwz cwexfzng