Breaking News: Grepper is joining You.com. Read the official announcement!

typescript declare dictionary type

Defiant Dove answered on March 9, 2022 Popularity 10/10 Helpfulness 5/10

answer typescript declare dictionary type

related typescript Dictionary

typescript declare dictionary type

Comment

var persons: { [id: string] : string; } = {};
persons["p1"] = { firstName: "F1", lastName: "L1" };

Popularity 10/10 Helpfulness 5/10 Language typescript

Source: stackoverflow.com

Tags: declare dictionary typescript

Link to this answer
Share Copy Link

Contributed on Mar 09 2022

Defiant Dove

0 Answers Avg Quality 2/10

Closely Related Answers

typescript Dictionary

Comment

class Dictionary<T> {
    private items: { [key: string]: T };

    constructor() {
        this.items = {};
    }

    // Method to check if the dictionary contains a key
    has(key: string): boolean {
        return key in this.items;
    }

    // Method to add or update a key-value pair
    set(key: string, value: T): void {
        this.items[key] = value;
    }

    // Method to get the value associated with a key
    get(key: string): T | undefined {
        return this.items[key];
    }

    // Method to remove a key-value pair
    delete(key: string): void {
        if (this.has(key)) {
            delete this.items[key];
        }
    }

    // Method to get all keys
    keys(): string[] {
        return Object.keys(this.items);
    }

    // Method to get all values
    values(): T[] {
        return Object.values(this.items);
    }

    // Method to get all key-value pairs
    entries(): [string, T][] {
        return Object.entries(this.items);
    }

    // Method to clear the dictionary
    clear(): void {
        this.items = {};
    }

    // Method to get the size of the dictionary
    size(): number {
        return Object.keys(this.items).length;
    }

    // Custom getter for [key] syntax
    get [key: string](): T | undefined {
        return this.items[key];
    }

    // Custom setter for [key] syntax
    set [key: string](value: T) {
        this.items[key] = value;
    }
}

// Test the modified Dictionary class
const dict = new Dictionary<number>();
dict.set("a", 1);
dict.set("b", 2);
dict.set("c", 3);

console.log(dict.get("a")); // Output: 1
console.log(dict.keys());   // Output: ["a", "b", "c"]
console.log(dict.values()); // Output: [1, 2, 3]

dict.delete("b");
console.log(dict.keys());   // Output: ["a", "c"]

dict.clear();
console.log(dict.size());   // Output: 0

// Using [key] syntax
dict["x"] = 10;
console.log(dict["x"]);     // Output: 10
console.log(dict["d"]);     // Output: undefined

Popularity 9/10 Helpfulness 4/10 Language typescript

Source: chat.openai.com

Tags: dictionary d

Link to this answer
Share Copy Link

Contributed on Mar 31 2024

JimmyCat 777

0 Answers Avg Quality 2/10

typescript declare dictionary type

Contents

More Related Answers

typescript declare dictionary type

Closely Related Answers

typescript Dictionary

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.