class Hash{
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 index = this._hash(key);
if(!this.data[index])
this.data[index] = [];
this.data[index].push([key,value]);
}
get(key)
{
let index = this._hash(key);
let currentBucket = this.data[index];
if(currentBucket.length)
{
for(let i=0;i<currentBucket.length;i++)
{
if(currentBucket[i][0]==key)
return currentBucket[i][1]
}
}
return undefined;
}
keys(){
let keysArray=[];
for(let i=0;i<this.data.length;i++)
{
for(let j=0;j<this.data[i].length;j++)
keysArray.push(this.data[i][j][0])
}
return keysArray;
}
}
let obj = new Hash();
obj.set('grapes',10000);
obj.set('oranges',4)
obj.set('apples',20000);
console.log(obj.get('apples'))
console.log(obj.keys())
