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What are the Differences Between Map and Object in JavaScript ?

Last Updated : 29 Jan, 2024
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Maps and Objects both are used to store data in the form of key-value pairs although both of these data types allow you to get, delete, and update the values stored in them. Also, objects have been used as maps. But, there are many differences between them as listed in the below table:

Map

Objects

It provides a size property to get the size of the Map.

The number of properties stored in an object is determined manually.

Keys can be of any type including functions, objects, or any primitive.

Keys of an object can either be of a string or a Symbol type.

It is an iterable entity and can be directly iterated.

It requires to obtain properties in a certain manner and then iterate over them.

It stores keys in the same order as they were inserted.

It does not store keys in a particular order.

It performs well in the cases where the continuous removal and addition of key-value pairs occur.

It does not work efficiently in these cases as compared to the Map.


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