@obsidize/rx-map/maps/proxy-iterable-iterator.js

ES6 Map with rxjs extensions for change detection

/**
 * Utility for masking RxMap iterators, so that
 * the underlying map values cannot be mutated while using them.
 */
export class ProxyIterableIterator {
    constructor(source, transform) {
        this.source = source;
        this.transform = transform;
    }
    [Symbol.iterator]() {
        return this;
    }
    next() {
        const { value, done } = this.source.next();
        return {
            value: this.transform(value),
            done
        };
    }
}