What is the use of the Map.prototype.clear method in JavaScript Maps ?
In JavaScript, the Map.prototype.clear
method is used to remove all key-value pairs from a Map, effectively making the Map empty. It does not take any arguments and does not return any value.
Syntax:
myMap.clear();
myMap
: The Map from which you want to remove all key-value pairs.
Example: Here, a map object “myMap” has been created with a single [key, value] pair, and the Map.clear() method is used to remove the [key, value] pair from “myMap”. myMap.size() is used to check the number of [key, value] pairs belonging to the map object.
Javascript
// Creating a map object let myMap = new Map(); // Adding [key, value] pair to the map myMap.set(0, 'w3wiki' ); // Displaying the number of // [key, value] pairs the map has console.log(myMap.size); // Removing the [key, value] pairs of // the map using Map.clear() method myMap.clear(); // Displaying the number of // [key, value] pairs the map has console.log(myMap.size); |
Output
1 0
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