axax/esnext/pluck.js

A library of async iterator extensions for JavaScript including ```map```, ```reduce```, ```filter```, ```flatMap```, ```pipe``` and [more](https://github.com/jamiemccrindle/axax/blob/master/docs/API.md#functions).

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Maps the source objects to their values at the path specified
 */
function pluck(...path) {
    return async function* inner(source) {
        for await (const item of source) {
            let value = item;
            for (const key of path) {
                if (value[key] === undefined) {
                    value = undefined;
                    break;
                }
                value = value[key];
            }
            yield value;
        }
    };
}
exports.pluck = pluck;