@reactivex/ix-esnext-esm/iterable/operators/map.js

The Interactive Extensions for JavaScript

import { IterableX } from '../iterablex';
import { bindCallback } from '../../util/bindcallback';
export class MapIterable extends IterableX {
    constructor(source, selector) {
        super();
        this._source = source;
        this._selector = selector;
    }
    *[Symbol.iterator]() {
        let i = 0;
        for (const item of this._source) {
            yield this._selector(item, i++);
        }
    }
}
export function map(selector, thisArg) {
    return function mapOperatorFunction(source) {
        return new MapIterable(source, bindCallback(selector, thisArg, 2));
    };
}

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