JS Hash table implementation

hash-table.js

// @ts-check
/* eslint-disable no-param-reassign */

import crc32 from 'crc-32';

const collision = (map, key, hash) => map[hash] && key !== map[hash][0]

// BEGIN (write your solution here)
export const get = (map, key, defaultValue = null) => {
  const hash = crc32.str(key)
  return collision(map, key, hash) || !map[hash] ? defaultValue : map[hash][1]
}

export const set = (map, key, val) => {
  const hash = crc32.str(key)
  
  if(collision(map, key, hash)) return false
  
  map[hash] = [key, val]
  
  return true
}

export const make = () => []
// END