Hash Table JS

hashTable.js

function idk(key,size){
    return [...key].map(x=>33*x.charCodeAt(0)%key.length).reduce((a,c)=>c+a);
}
console.log(idk('firstName', 113))

class table{

    items = new Array(113);
    setItem(key, value){
      const idx= idk(key, this.items.length);
      if(this.items[idx]){
          this.items[idx].push([key, value])
        }else{
            this.items[idx] = [[key, value]];
        }
    }
    getItem(key){
        const idx = idk(key, this.items.length);
        if(!this.items[idx]) return null;
        return this.items[idx].find(x=>x[0] === key)[1];
    }
}

const tb = new table();
tb.setItem('firstName', 'Johnny');
tb.setItem('mid', 'AlanD20');
tb.setItem('lastName', 'Timmy');
console.log(tb.getItem('firstName'));
console.log(tb.items);

//tut https://youtu.be/UOxTMOCTEZk