Map data structure in javascript
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Javascript map array of objects!
New map javascript
Map in JS
A holds key-value pairs and is similar to a Hash Map or Dictionary in other languages.
- Preserve the original insertion order.
- It supports any type, including objects and primitives, as keys or values.
This feature allows for efficient data retrieval and manipulation.
- Hashing that makes time complexities of operations like search, insert and delete constant or O(1) on average. It is useful for operations like counting frequencies, maintaining dictionaries, and storing key-based objects.
- Only Unique Keys are allowed, if we insert the same key with a different value, it overwrites the previous one.
- It is always recommended to use Maps over Objects when we have frequent insert and delete operations as maps perform better.
OutputMap(3) { 'k1' => 'v1', 'k2' => 'v2', 'k3' => 'v3' }
Recommended Links:
Creating a Map
Map() constructor
- Passing an Array to
- Create a Map and use
OutputMap(3) { 'k1' => 'v1', 'k2' => 'v2', 'k3' => 'v4' }
- set(key, val) : Adds or updates an element with a specified key and
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