KvpDictionary.ts

import { Enumerable } from "powerseq/enumerable";

class KeyValuePair<T> {
  key: string;
  value: T;
}

class KvpDictionary<T> {
    mapping: { [key: string]: T } = {}
    public get keys(): Enumerable<string> {
        return Enumerable.from(this.getKeys());
    }
    public get values(): Enumerable<T> {
        return Enumerable.from(this.getValues());
    }
    public get pairs(): Enumerable<KeyValuePair<T>> {
        return Enumerable.from(this.getPairs());
    }
    private *getKeys(): Iterable<string> {
        for (let key in this.mapping)
            yield key;
    }
    private *getValues(): Iterable<T> {
        for (let key in this.mapping)
            yield this.mapping[key];
    }
    private *getPairs(): Iterable<KeyValuePair<T>> {
        for (let key in this.mapping)
            yield { key: key, value: this.mapping[key] }
    }
}