hashTable.js

class HashTable {
    constructor(size){
      this.data = new Array(size);
    }
  
    _hash(key) {
      let hash = 0;
      for (let i =0; i < key.length; i++){
          hash = (hash + key.charCodeAt(i) * i) % this.data.length
      }
      return hash;
    }
    set(key, value){
        let address = this._hash(key);
        if(!this.data[address]){
            this.data[address] = [];
            this.data[address].push([key, value]);
           return this.data;
        }
          return this.data[address].push([key, value]);
    }
    get(key){
        let address = this._hash(key);
        let currentBucket = this.data[address];
       for (let i = 0; i < currentBucket.length; i++) {
        if(currentBucket[i][0] == key){
            return currentBucket[i][1]
        }
        return undefined
       }
    }
  }
  
  const myHashTable = new HashTable(50);
  myHashTable.set('grapes', 10000)
//   myHashTable.get('grapes')
 myHashTable.set('apples', 9)
//   myHashTable.get('apples')
console.log(myHashTable.get('apples'))