Clearing a Dictionary using Javascript

In JavaScript, dictionaries can be implemented using plain objects or ES6 Maps. Both approaches provide methods to clear all key-value pairs from the container.

Clearing Custom Dictionary Objects

For custom dictionary implementations using plain objects, you can create a clear() method that resets the container:

clear() {
    this.container = {}
}

Example with Custom Dictionary

class MyMap {
    constructor() {
        this.container = {};
    }
    
    put(key, value) {
        this.container[key] = value;
    }
    
    clear() {
        this.container = {};
    }
    
    display() {
        console.log(this.container);
    }
}

const myMap = new MyMap();
myMap.put("key1", "value1");
myMap.put("key2", "value2");

console.log("Before clearing:");
myMap.display();

myMap.clear();

console.log("After clearing:");
myMap.display();

Before clearing:
{ key1: 'value1', key2: 'value2' }
After clearing:
{}

Clearing ES6 Maps

ES6 Maps provide a built-in clear() method that removes all key-value pairs:

const myMap = new Map([
    ["key1", "value1"],
    ["key2", "value2"]
]);

console.log("Before clearing:");
console.log(myMap);

myMap.clear();

console.log("After clearing:");
console.log(myMap);

Before clearing:
Map(2) { 'key1' => 'value1', 'key2' => 'value2' }
After clearing:
Map(0) {}

Comparison of Methods

Conclusion

Both custom objects and ES6 Maps support clearing operations. Use this.container = {} for custom implementations or the built-in clear() method for ES6 Maps.