Map data structures

what I will be covering in this article

• What is the map data structure.
• How to use the map data structure.
• When to use the map data structure.

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What is the map data structure

Map allows keys of any type unlike an Object which is very like a Map.

Methods and properties are:

new Map() – creates a new map. map.set(key, value) – sets the value by the key returns the set. map.delete(key) – removes the value by the key. map.get(key) – returns the value by the key, or undefined if key doesn’t exist. map.has(key) – returns true if the key exists, false otherwise. map.clear() – clears the map compleately removing all values and keys. map.size – returns the current element count. map.forEach() map.size – returns the current element count. map.forEach() – iterate of the map similar to how it would work with an array.

How to use the map data structure.