hashtabler.js

Hashtabler.js

This library include a hash table

Methods

/**
 * Insert object
 *
 * @param {Object} object
 * @param {String} key
 * @returns {string} key
 */
insert(object, key = null);
/**
 * Find key
 *
 * @param {String} key
 * @returns {Object|undefined} Returns the object if key exists.
 */
get(key);
/**
 * Return true if key exists
 *
 * @param {String} key
 * @returns {boolean}
 */
existsKey(key);
/**
 * Calculate new key
 *
 * @param {Object} object
 * @returns {String}
 */
calculateKey(object);
/**
 * Delete object
 *
 * @param {String} key
 * @returns {boolean} Returns true if key are deleted.
 */
delete(key);
/**
 * Delete all objects
 *
 * @returns {boolean}
 */
clear();

Example

const { Hashtabler } = require('hashtabler');

let table = new Hashtabler();
let person1 = {
  name: 'Ricardo',
  age: 26
};
let person2 = {
    name: 'John',
    age: 32
};

let key1 = table.insert(person1);
console.log(key1); //87c7219c3741dc3a2019fbc9c30c1d846168bd6f
let key2 = table.insert(person2);
console.log(key2); //02f6a83a50b673a00a444f04008711e0f86f1451

let list = table.get(key1);
for (let item of list) {
    console.log(item); //{ name: 'Ricardo', age: 26 }
}

table.delete(key1);
console.log(table.get(key1)); //undefined

let key = table.insert(person2, 'PRS:{2}');
console.log(key); //{ name: 'Ricardo', age: 26 }

list = table.get(key);
for (let item of list) {
    console.log(item); //{ name: 'John', age: 32 }
}