Javascript hash map

gistfile1.txt

/**
 * A quick hash fn
 * @param {string} key
 * @param {number} limit
 */
function hash(key, limit) {
  const hashedKey = key.split("").reduce((acc, el) => {
    return acc + el.charCodeAt(0);
  }, 0);

  return hashedKey % limit;
}

class HashMap {

  /**
   * Creates a new HashMap with the specified number of buckets
   * @param size the number of buckets to create
   */
  constructor(size) {
    this.size = size;
    this.data = new Array(size);
    for (let i = 0; i < this.data.length; i++) {
      this.data[i] = new Map();
    }
  }

  /**
   * Returns the value associated to the key, or undefined if there is none
   * @param key
   */
  get(key) {
    const index = hash(key, this.size);
    return this.data[index].get(key);
  }

  /**
   * Sets the value for the key in the bucket
   * @param key
   * @param value
   */
  set(key, value) {
    const index = hash(key, this.size);
    this.data[index].set(key, value);
  }

  /**
   * Returns true upon successful remove
   * @param key
   */
  delete(key) {
    const index = hash(key, this.size);
    return this.data[index].delete(key);
  }

  debug() {
    return this.data;
  }
}

// const dict = new HashMap(5)
// dict.set('eric', 1977)
// dict.set('andy', 1980)
// dict.set('max', 2013)
// dict.set('nathan', 1999)
// console.log(dict.get('eric'))
// console.log(dict.debug())