hashmap-impl.js

class HashMap {
    
    constructor() {
        this.map = {}
    }
    
    hash(k) {
        return k % 10
    }
    
    add(key, value) {
        let k = this.hash(key)
        if(!this.map[k]) {
            this.map[k] = []
        }
        this.map[k].push(value)
    }
    
    get(key) {
        let k = this.hash(key)
        return this.map[k]
    }
    
}

let h = new HashMap()

h.add(10, "hello")
h.add(100001, "world")
h.add(1, "this is a string")

console.log(h)